runtime: require gdb version 7.9 for gdb test
runtime: require gdb version 7.9 for gdb test

Issue 11214 reports problems with older versions of gdb.  It does work
with gdb 7.9 on my Ubuntu Trusty system, so take that as the minimum
required version.

Fixes #11214.

Change-Id: I61b732895506575be7af595f81fc1bcf696f58c2
Reviewed-on: https://go-review.googlesource.com/12626
Reviewed-by: Austin Clements <7ea35d812706d9213868749011af1ed4fa2f6aa0@google.com>

josharian/go,yasarkunduz/go,shazow/go,vsekhar/elastic-go,RBEGamer/go,XuYunnan/go,zouchao2010/go,suncycheng/go,leeric92/go,4ad/go,ichu501/go,binarycrusader/go,danielsoro/go,danielsoro/go,RBEGamer/go,vsdutka/go,cyberroadie/go,qskycolor/go,donnel6809/go,sinuos/go,ErikDubbelboer/go,dgnorton/go,sndnvaps/go,ImJasonH/go,mbrukman/go,jmptrader/go,cloudflare/go,b54898533/go,JioCloud/go,jameskumar/go,nakedgc/go,vanloswang/go,jacobhaven/go,arschles/golang-go,jonathanmarvens/go,chinanjjohn2012/go,joshsammut/go,jasonxiong/go,NunoEdgarGub1/go,donnel6809/go,jdhenke/go,honsiorovskyi/go,Samurais/go,ifagnosticism/go,akutz/go,JioCloud/go,linux-on-ibm-z/go,NunoEdgarGub1/go,wangfakang/go-1,jacobxk/go,goodlang/good,derekmarcotte/go,danielsoro/go,zouchao2010/go,skotti/go,AALEKH/go,Pulgafree/go,ifagnosticism/go,roth1002/go,Jordanzuo/go,cainiaocome/go,vsdutka/go,rachtsingh/gogojuice,codestation/go,kakuhiroshi/go,vanloswang/go,suncycheng/go,qskycolor/go,likesea/go,fjballest/golang,shazow/go,Young55555/go,wangfakang/go-1,samanalysis/go,joshsammut/go,CiscoCloud/go,NunoEdgarGub1/go,rentongzhang/go,parkdy/go,Endika/go,momchil-velikov/go,albertjin/golang-go,devpadawan/go,snowsnail/go,sosop/go,cyberroadie/go,AALEKH/go,ifagnosticism/go,Cofyc/go,ericsnowcurrently/go,myPublicGit/go,jameskumar/go,jasonxiong/go,gdey/go,jmptrader/go,theif519/go,arschles/go-1,jmptrader/go,golang/go,theass/go,theass/go,derekmarcotte/go,cloudrain21/go,devpadawan/go,Cofyc/go,xinhuang327/go,slavau/go,jameskumar/go,andrewchambers/go,CarterTsai/go,mwhudson/go,youprofit/go,baiyunping333/go,vsekhar/elastic-go,jonahglover/go,ErikDubbelboer/go,undergrowthlinear/go,gdey/go,yuhengye/go,deft-code/go,RBEGamer/go,kim-racktop/go,sinuos/go,danielsoro/go,sndnvaps/go,josharian/go,jonathanmarvens/go,vsdutka/go,willjunspecial/go,constantine001/go,JioCloud/go,nakedgc/go,shazow/go,rentongzhang/go,GeorgiCodes/go,jonathanmarvens/go,mbrukman/go,jonahglover/go,dafyddcrosby/go,CAFxX/go,jdeng/go,jdeng/go,ganboing/go-esx,4ad/go,baiyunping333/go,sosop/go,danielsoro/go,leeric92/go,malvira/go,Jordanzuo/go,malvira/go,akutz/go,mgyenik/go,youprofit/go,Samurais/go,jefby/go,alex-zhang/go,AALEKH/go,NichoZhang/go,mdp/go,xiaobodu/go,Cofyc/go,ObjectiveJoe/go,kim-racktop/go,RBEGamer/go,vanloswang/go,parkdy/go,uileyar/go,samanalysis/go,g522342435/go,sosop/go,ericsnowcurrently/go,WIZARD-CXY/go,shazow/go,rachtsingh/gogojuice,suncycheng/go,g522342435/go,xinhuang327/go,dgnorton/go,qskycolor/go,jacobhaven/go,albertjin/golang-go,theif519/go,yasarkunduz/go,samanalysis/go,springning/go,willjunspecial/go,cnbin/go,xiuzhifu/go,jefby/go,yangzhongj/go,dterei/go,Samurais/go,mgyenik/go,ObjectiveJoe/go,golang/go,yasarkunduz/go,Stan-Lin-/go,greyhwndz/go,Cofyc/go,shazow/go,likesea/go,WIZARD-CXY/go,zhangg/go,andrewchambers/go,xujianhai/go,youprofit/go,constantine001/go,theif519/go,jdeng/go,cnbin/go,Endika/go,XuYunnan/go,vsdutka/go,zcwfeng/go,polyverse-security/go,goodlang/good,Cofyc/go,ErikDubbelboer/go,kim-racktop/go,vsekhar/elastic-go,cloudrain21/go,jonasi/go,nakedgc/go,ichu501/go,momchil-velikov/go,jacobsa/go,zcwfeng/go,linux-on-ibm-z/go,NunoEdgarGub1/go,parkdy/go,jefby/go,andrewchambers/go,Jordanzuo/go,jmptrader/go,polyverse-security/go,vsekhar/elastic-go,constantine001/go,jdeng/go,ichu501/go,jefby/go,Samurais/go,wangfakang/go-1,willjunspecial/go,miolini/go,codestation/go,CodyGuo/go,Pulgafree/go,xiuzhifu/go,ichu501/go,josharian/go,Stan-Lin-/go,mbrukman/go,shines77/go,dterei/go,yuhengye/go,Young55555/go,joshsammut/go,theass/go,Stan-Lin-/go,Samurais/go,vanloswang/go,Jordanzuo/go,goodlang/good,arschles/golang-go,linux-on-ibm-z/go,lihuanghai/go,joshsammut/go,jacobsa/go,NichoZhang/go,jameskumar/go,jdeng/go,rentongzhang/go,rentongzhang/go,goodlang/good,baiyunping333/go,sndnvaps/go,kevinc0825/go,4ad/go,CodyGuo/go,parkdy/go,rentongzhang/go,ObjectiveJoe/go,b54898533/go,cookerzhu/go,cloudflare/go,kakuhiroshi/go,mikekap/go,constantine001/go,mwhudson/go,springning/go,alex-zhang/go,dgnorton/go,cloudflare/go,gohin/go,likesea/go,kim-racktop/go,jonasi/go,greyhwndz/go,CarterTsai/go,sndnvaps/go,famorted/go,chinanjjohn2012/go,arschles/go-1,NunoEdgarGub1/go,Endika/go,ericsnowcurrently/go,roth1002/go,jacobhaven/go,g522342435/go,dgnorton/go,andrewchambers/go,ichu501/go,xujianhai/go,jefby/go,zouchao2010/go,jefby/go,albertjin/golang-go,fjballest/golang,zcwfeng/go,yuhengye/go,uileyar/go,theass/go,g522342435/go,myPublicGit/go,NunoEdgarGub1/go,parkdy/go,xiaobodu/go,Young55555/go,ganboing/go-esx,ichu501/go,ganboing/go-esx,ganboing/go-esx,AALEKH/go,famorted/go,zhangg/go,leeric92/go,CAFxX/go,b54898533/go,yangzhongj/go,vishsingh/go,zhangg/go,NichoZhang/go,mwhudson/go,arschles/golang-go,suncycheng/go,nawawi/go,vishsingh/go,mgyenik/go,suncycheng/go,skatsuta/go,jonasi/go,cainiaocome/go,cloudflare/go,samanalysis/go,sosop/go,baiyunping333/go,codestation/go,kakuhiroshi/go,derekmarcotte/go,WIZARD-CXY/go,mdp/go,arschles/go-1,nakedgc/go,andrewchambers/go,jonathanmarvens/go,mwhudson/go,codestation/go,willjunspecial/go,roth1002/go,Endika/go,skotti/go,odeke-em/go,NunoEdgarGub1/go,lihuanghai/go,Young55555/go,roth1002/go,fjballest/golang,ImJasonH/go,springning/go,malvira/go,JioCloud/go,golang/go,Young55555/go,XuYunnan/go,jacobxk/go,qskycolor/go,cookerzhu/go,samanalysis/go,leeric92/go,deft-code/go,cookerzhu/go,mdp/go,skotti/go,kakuhiroshi/go,cookerzhu/go,jacobhaven/go,yuhengye/go,jameskumar/go,beealone/go,jameskumar/go,sosop/go,NichoZhang/go,donnel6809/go,theass/go,roth1002/go,Charlesdong/go-1,odeke-em/go,GeorgiCodes/go,jonahglover/go,springning/go,uileyar/go,nakedgc/go,yangzhongj/go,binarycrusader/go,ericsnowcurrently/go,cainiaocome/go,sinuos/go,constantine001/go,cloudflare/go,honsiorovskyi/go,cyberroadie/go,famorted/go,lihuanghai/go,CodyGuo/go,gdey/go,Endika/go,rentongzhang/go,jefby/go,slavau/go,leeric92/go,roth1002/go,yasarkunduz/go,shazow/go,cloudflare/go,CodyGuo/go,CiscoCloud/go,zcwfeng/go,jasonxiong/go,jonasi/go,xinhuang327/go,odeke-em/go,stormltf/go,cainiaocome/go,ganboing/go-esx,cookerzhu/go,mdp/go,deft-code/go,willjunspecial/go,shines77/go,malvira/go,danycoro/go,AALEKH/go,CAFxX/go,lihuanghai/go,zcwfeng/go,Samurais/go,yuhengye/go,willjunspecial/go,alash3al/go,theass/go,sinuos/go,arschles/golang-go,parkdy/go,xujianhai/go,donnel6809/go,alash3al/go,kakuhiroshi/go,XuYunnan/go,undergrowthlinear/go,monetate/go,gohin/go,JioCloud/go,yangzhongj/go,CAFxX/go,golang/go,NunoEdgarGub1/go,Stan-Lin-/go,danycoro/go,jacobsa/go,mwhudson/go,4ad/go,fjballest/golang,b54898533/go,joshsammut/go,mdp/go,xiaobodu/go,b54898533/go,dafyddcrosby/go,Endika/go,theass/go,dpatel06/go,polyverse-security/go,kevinc0825/go,donnel6809/go,vsdutka/go,derekmarcotte/go,jdeng/go,dpatel06/go,myPublicGit/go,CodyGuo/go,danycoro/go,rentongzhang/go,cnbin/go,zhangg/go,famorted/go,binarycrusader/go,Pulgafree/go,b54898533/go,wangfakang/go-1,golang/go,mikekap/go,Young55555/go,xiuzhifu/go,jasonxiong/go,CiscoCloud/go,Badredapple/go,arschles/golang-go,danycoro/go,jonathanmarvens/go,cyberroadie/go,gdey/go,ObjectiveJoe/go,g522342435/go,jdhenke/go,yuhengye/go,cainiaocome/go,sndnvaps/go,cloudrain21/go,samanalysis/go,Pulgafree/go,arschles/go-1,GeorgiCodes/go,theif519/go,Young55555/go,lihuanghai/go,undergrowthlinear/go,monetate/go,odeke-em/go,mdp/go,yuhengye/go,ifagnosticism/go,vsdutka/go,vanloswang/go,jonahglover/go,CiscoCloud/go,XuYunnan/go,josharian/go,gohin/go,GeorgiCodes/go,zouchao2010/go,ErikDubbelboer/go,cyberroadie/go,myPublicGit/go,akutz/go,joshsammut/go,xujianhai/go,ifagnosticism/go,cnbin/go,theass/go,rentongzhang/go,vanloswang/go,undergrowthlinear/go,joshsammut/go,Badredapple/go,jonahglover/go,ganboing/go-esx,albertjin/golang-go,miolini/go,lihuanghai/go,yasarkunduz/go,CodyGuo/go,ImJasonH/go,Samurais/go,devpadawan/go,XuYunnan/go,Badredapple/go,cyberroadie/go,polyverse-security/go,sinuos/go,momchil-velikov/go,ErikDubbelboer/go,nawawi/go,sinuos/go,monetate/go,xujianhai/go,youprofit/go,baiyunping333/go,nawawi/go,stormltf/go,josharian/go,jacobhaven/go,RBEGamer/go,qskycolor/go,CAFxX/go,mdp/go,gohin/go,shazow/go,linux-on-ibm-z/go,nakedgc/go,Jordanzuo/go,GeorgiCodes/go,skatsuta/go,akutz/go,XuYunnan/go,jdhenke/go,odeke-em/go,4ad/go,monetate/go,mbrukman/go,qskycolor/go,likesea/go,famorted/go,xujianhai/go,jmptrader/go,beealone/go,derekmarcotte/go,AALEKH/go,dterei/go,miolini/go,famorted/go,NichoZhang/go,CAFxX/go,gohin/go,baiyunping333/go,stormltf/go,danycoro/go,cyberroadie/go,suncycheng/go,ifagnosticism/go,danycoro/go,honsiorovskyi/go,goodlang/good,roth1002/go,ImJasonH/go,goodlang/good,vsekhar/elastic-go,chinanjjohn2012/go,slavau/go,malvira/go,wangfakang/go-1,alex-zhang/go,likesea/go,zhangg/go,Charlesdong/go-1,NichoZhang/go,samanalysis/go,arschles/go-1,ErikDubbelboer/go,ganboing/go-esx,stormltf/go,dterei/go,dgnorton/go,nawawi/go,skatsuta/go,likesea/go,ErikDubbelboer/go,ImJasonH/go,shines77/go,jacobxk/go,mwhudson/go,xinhuang327/go,Endika/go,alash3al/go,youprofit/go,vsekhar/elastic-go,miolini/go,constantine001/go,jonathanmarvens/go,WIZARD-CXY/go,fjballest/golang,fjballest/golang,AALEKH/go,jacobxk/go,akutz/go,nawawi/go,dafyddcrosby/go,Jordanzuo/go,rachtsingh/gogojuice,derekmarcotte/go,skotti/go,kim-racktop/go,binarycrusader/go,likesea/go,xiuzhifu/go,cookerzhu/go,alex-zhang/go,sosop/go,momchil-velikov/go,arschles/go-1,albertjin/golang-go,likesea/go,NichoZhang/go,Charlesdong/go-1,qskycolor/go,beealone/go,rachtsingh/gogojuice,cloudrain21/go,Cofyc/go,snowsnail/go,ifagnosticism/go,malvira/go,jacobsa/go,monetate/go,zhangg/go,gdey/go,jefby/go,jonathanmarvens/go,zouchao2010/go,vishsingh/go,gdey/go,willjunspecial/go,Jordanzuo/go,springning/go,cnbin/go,xiuzhifu/go,vishsingh/go,CiscoCloud/go,dterei/go,ErikDubbelboer/go,chinanjjohn2012/go,Stan-Lin-/go,gdey/go,leeric92/go,Stan-Lin-/go,dterei/go,theif519/go,XuYunnan/go,yangzhongj/go,roth1002/go,CarterTsai/go,linux-on-ibm-z/go,yangzhongj/go,parkdy/go,monetate/go,jasonxiong/go,sinuos/go,albertjin/golang-go,xiuzhifu/go,dafyddcrosby/go,kevinc0825/go,jonasi/go,parkdy/go,greyhwndz/go,dpatel06/go,danycoro/go,mikekap/go,CarterTsai/go,monetate/go,mbrukman/go,slavau/go,zcwfeng/go,constantine001/go,rachtsingh/gogojuice,zcwfeng/go,christopher-henderson/Go,springning/go,xinhuang327/go,dterei/go,jdhenke/go,rachtsingh/gogojuice,CiscoCloud/go,malvira/go,jacobhaven/go,ganboing/go-esx,nawawi/go,chinanjjohn2012/go,baiyunping333/go,cookerzhu/go,albertjin/golang-go,baiyunping333/go,Young55555/go,GeorgiCodes/go,momchil-velikov/go,greyhwndz/go,codestation/go,suncycheng/go,jasonxiong/go,Badredapple/go,xiuzhifu/go,ericsnowcurrently/go,snowsnail/go,andrewchambers/go,CAFxX/go,polyverse-security/go,sinuos/go,xiaobodu/go,mgyenik/go,4ad/go,xujianhai/go,famorted/go,odeke-em/go,joshsammut/go,cainiaocome/go,xiaobodu/go,cainiaocome/go,skotti/go,deft-code/go,dafyddcrosby/go,youprofit/go,myPublicGit/go,NichoZhang/go,slavau/go,josharian/go,kevinc0825/go,devpadawan/go,miolini/go,jacobhaven/go,Charlesdong/go-1,shines77/go,Badredapple/go,mikekap/go,greyhwndz/go,cnbin/go,CodyGuo/go,danycoro/go,snowsnail/go,Pulgafree/go,4ad/go,CodyGuo/go,mgyenik/go,Stan-Lin-/go,zcwfeng/go,mwhudson/go,ImJasonH/go,shines77/go,slavau/go,constantine001/go,sosop/go,gdey/go,Badredapple/go,momchil-velikov/go,sndnvaps/go,dpatel06/go,odeke-em/go,Charlesdong/go-1,dafyddcrosby/go,goodlang/good,myPublicGit/go,jacobxk/go,skatsuta/go,derekmarcotte/go,mdp/go,springning/go,mikekap/go,wangfakang/go-1,youprofit/go,chinanjjohn2012/go,GeorgiCodes/go,undergrowthlinear/go,skotti/go,cloudrain21/go,shines77/go,undergrowthlinear/go,codestation/go,RBEGamer/go,CarterTsai/go,ifagnosticism/go,donnel6809/go,RBEGamer/go,dpatel06/go,beealone/go,nawawi/go,jasonxiong/go,kim-racktop/go,josharian/go,arschles/golang-go,akutz/go,jameskumar/go,b54898533/go,lihuanghai/go,alash3al/go,deft-code/go,vishsingh/go,honsiorovskyi/go,snowsnail/go,mikekap/go,Endika/go,dafyddcrosby/go,yasarkunduz/go,devpadawan/go,dpatel06/go,shazow/go,honsiorovskyi/go,jacobxk/go,gohin/go,nawawi/go,kevinc0825/go,skatsuta/go,jdhenke/go,dpatel06/go,ImJasonH/go,mgyenik/go,b54898533/go,albertjin/golang-go,jacobxk/go,arschles/golang-go,sosop/go,dterei/go,qskycolor/go,CiscoCloud/go,g522342435/go,snowsnail/go,JioCloud/go,shines77/go,jasonxiong/go,cloudrain21/go,kevinc0825/go,mbrukman/go,devpadawan/go,yangzhongj/go,cookerzhu/go,kakuhiroshi/go,cloudflare/go,undergrowthlinear/go,jonasi/go,gohin/go,snowsnail/go,cnbin/go,famorted/go,willjunspecial/go,arschles/golang-go,stormltf/go,vsekhar/elastic-go,ObjectiveJoe/go,ericsnowcurrently/go,wangfakang/go-1,suncycheng/go,monetate/go,andrewchambers/go,skatsuta/go,vsdutka/go,jdhenke/go,miolini/go,miolini/go,yangzhongj/go,zouchao2010/go,uileyar/go,WIZARD-CXY/go,deft-code/go,jmptrader/go,dgnorton/go,jdeng/go,jacobsa/go,arschles/go-1,cyberroadie/go,deft-code/go,JioCloud/go,Samurais/go,nakedgc/go,AALEKH/go,skotti/go,momchil-velikov/go,binarycrusader/go,jdeng/go,codestation/go,myPublicGit/go,theif519/go,g522342435/go,slavau/go,CAFxX/go,g522342435/go,ericsnowcurrently/go,myPublicGit/go,sndnvaps/go,devpadawan/go,Badredapple/go,cnbin/go,arschles/go-1,mgyenik/go,xiuzhifu/go,Cofyc/go,golang/go,mgyenik/go,Charlesdong/go-1,RBEGamer/go,nakedgc/go,polyverse-security/go,cloudflare/go,springning/go,CarterTsai/go,ObjectiveJoe/go,jmptrader/go,Badredapple/go,greyhwndz/go,jonasi/go,greyhwndz/go,vanloswang/go,derekmarcotte/go,dafyddcrosby/go,Charlesdong/go-1,samanalysis/go,ericsnowcurrently/go,mikekap/go,WIZARD-CXY/go,mwhudson/go,dgnorton/go,shines77/go,sndnvaps/go,xinhuang327/go,deft-code/go,binarycrusader/go,Stan-Lin-/go,CiscoCloud/go,greyhwndz/go,fjballest/golang,jdhenke/go,momchil-velikov/go,skatsuta/go,mbrukman/go,WIZARD-CXY/go,jonathanmarvens/go,leeric92/go,xiaobodu/go,honsiorovskyi/go,vsekhar/elastic-go,jonasi/go,jacobsa/go,fjballest/golang,CarterTsai/go,GeorgiCodes/go,cainiaocome/go,jmptrader/go,gohin/go,rachtsingh/gogojuice,wangfakang/go-1,malvira/go,vishsingh/go,Pulgafree/go,mikekap/go,beealone/go,danielsoro/go,jonahglover/go,undergrowthlinear/go,kevinc0825/go,Cofyc/go,devpadawan/go,chinanjjohn2012/go,ichu501/go,beealone/go,uileyar/go,xiaobodu/go,beealone/go,Pulgafree/go,alex-zhang/go,jacobhaven/go,ImJasonH/go,golang/go,danielsoro/go,xujianhai/go,codestation/go,alash3al/go,polyverse-security/go,theif519/go,donnel6809/go,skatsuta/go,uileyar/go,jameskumar/go,kim-racktop/go,skotti/go,cloudrain21/go,binarycrusader/go,uileyar/go,donnel6809/go,theif519/go,linux-on-ibm-z/go,stormltf/go,honsiorovskyi/go,slavau/go,xinhuang327/go,stormltf/go,xiaobodu/go,youprofit/go,vishsingh/go,alex-zhang/go,kim-racktop/go,josharian/go,honsiorovskyi/go,danielsoro/go,zhangg/go,jonahglover/go,zouchao2010/go,Pulgafree/go,miolini/go,jonahglover/go,4ad/go,zouchao2010/go,polyverse-security/go,vsdutka/go,jdhenke/go,beealone/go,zhangg/go,alash3al/go,dgnorton/go,JioCloud/go,alex-zhang/go,jacobsa/go,jacobsa/go,mbrukman/go,vishsingh/go,yasarkunduz/go,linux-on-ibm-z/go,jacobxk/go,alash3al/go,Charlesdong/go-1,ichu501/go,snowsnail/go,yasarkunduz/go,uileyar/go,goodlang/good,ObjectiveJoe/go,kevinc0825/go,akutz/go,kakuhiroshi/go,andrewchambers/go,WIZARD-CXY/go,cloudrain21/go,ObjectiveJoe/go,yuhengye/go,dpatel06/go,akutz/go,golang/go,linux-on-ibm-z/go,binarycrusader/go,Jordanzuo/go,kakuhiroshi/go,chinanjjohn2012/go,alash3al/go,leeric92/go,alex-zhang/go,odeke-em/go,CarterTsai/go,lihuanghai/go,rachtsingh/gogojuice,stormltf/go,vanloswang/go,xinhuang327/go