Dockerfile.s390x: Switch to golang 1.7
Dockerfile.s390x: Switch to golang 1.7

With golang version 1.7 the s390x architecture is officially supported.
To be in sync with the other architectures now switch also for s390x
from gccgo 6.1 to golang:

 - golang: build and install to /usr/src/go
   * Download golang-1.7 sources
   * Bootstrap with gccgo 6.1
 - go lint: Sync GO_LINT_COMMIT with other Dockerfiles
 - notary: Remove GO15VENDOREXPERIMENT and softlink hack

With this patch the current CI on s390x completes with:

 - OK: 1375 passed, 43 skipped

Signed-off-by: Michael Holzheu <db4757c56f54651f568cc7cda79cd93c781b1605@linux.vnet.ibm.com>

harche/docker,SvenDowideit/docker,tianon/docker,mahak/docker,erikh/docker,konstruktoid/docker-upstream,splunk/docker,YuPengZTE/docker,akira-baruah/docker,estesp/docker,Syntaxide/docker,laijs/moby,afein/docker,pramodhkp/moby,kolyshkin/docker,bearstech/moby,Syntaxide/docker,imkin/moby,haveatry/docker,laijs/docker,qudongfang/docker,qudongfang/docker,mtesselH/docker,Ramzec/docker,Ramzec/docker,stevvooe/docker,hqhq/moby,darrenstahlmsft/docker,scotttlin/docker,xiaods/docker,nalind/docker,hqhq/moby,JMesser81/docker,mike1729/docker,alfred-landrum/docker,splunk/docker,shishir-a412ed/docker,Syntaxide/docker,noironetworks/docker,jlhawn/docker,liaoqingwei/docker,moul/docker,vdemeester/docker,bearstech/moby,mikebrow/docker,msabansal/docker,johnstep/moby-moby,michael-holzheu/docker,laijs/moby,tklauser/docker,ColinHebert/docker,konstruktoid/docker-1,paralin/docker,tmp6154/docker,thaJeztah/docker,unclejack/docker,konstruktoid/docker-upstream,michelvocks/docker,x1022as/docker,q384566678/docker,Mokolea/docker,naveed-jamil-tenpearls/moby,tophj-ibm/docker,ndeloof/docker,nawawi/docker,dgageot/docker,sterchelen/docker,darrenstahlmsft/docker,laijs/moby,danyalKhaliq10p/moby,yummypeng/docker,haveatry/docker,amatsus/docker,mohmost12/docker,bearstech/moby,mikebrow/docker,Mokolea/docker,erikstmartin/docker,ibuildthecloud/docker,fcrisciani/docker,shishir-a412ed/docker,dperny/docker,Mokolea/docker,ColinHebert/docker,kunalkushwaha/docker,lixiaobing1/docker,JMesser81/docker,endophage/docker,erikh/docker,dccurtis/docker,scotttlin/docker,vdemeester/docker,nawawi/docker,imkin/moby,harche/docker,allencloud/docker,haveatry/docker,michael-holzheu/docker,naveed-jamil-tenpearls/moby,amatsus/docker,danyalKhaliq10p/moby,mikedougherty/docker,coolljt0725/docker,dims/docker,cyphar/docker,madhanrm/docker,yongtang/docker,tophj-ibm/moby,mahak/docker,portworx/docker,moul/docker,ajaymdesai/docker,cyphar/docker,miminar/docker,prertik/docker,diogomonica/docker,mtesselH/docker,darrenstahlmsft/docker,bonczj/moby-json-file-logger,estesp/docker,JMesser81/docker,johnstep/moby-moby,diogomonica/docker,raja-sami-10p/moby,dmcgowan/docker,duglin/docker,darrenstahlmsft/moby,mohmost12/docker,tmp6154/docker,mikebrow/docker,gschaetz/moby,diogomonica/docker,moby/moby,jwhonce/docker,cpuguy83/docker,dsheets/moby,mkumatag/docker,HideoYamauchi/docker,mikedougherty/docker,rremer/moby,flavio/docker,rremer/moby,ibuildthecloud/docker,rancher/docker,yasiramin10p/moby,mixja/docker,kunalkushwaha/docker,PatrickLang/moby,lixiaobing1/docker,jimjag/docker,Mokolea/docker,resin-io/docker,rremer/moby,mstanleyjones/docker,lixiaobing10051267/docker,yosifkit/docker,duglin/docker,kencochrane/docker,Ramzec/docker,endophage/docker,imkin/moby,dgageot/docker,darrenstahlmsft/moby,whuwxl/docker,paralin/docker,djs55/docker,alfred-landrum/docker,mtanlee/docker,shishir-a412ed/docker,trebonian/docker,trebonian/docker,portworx/docker,stevvooe/docker,jvanz/docker,resin-io/docker,djs55/docker,YuPengZTE/docker,moby/moby,mkumatag/docker,cyphar/docker,pradipd/moby,asbjornenge/docker,xuxinkun/docker,q384566678/docker,kojiromike/docker,xiaods/docker,erikh/docker,bonczj/moby-json-file-logger,liaoqingwei/docker,mixja/docker,ndeloof/docker,qudongfang/docker,tmp6154/docker,gnailuy/docker,ajaymdesai/docker,stevvooe/docker,gjaskiewicz/moby,tianon/docker,coolljt0725/docker,yongtang/docker,srust/docker,sdurrheimer/docker,raja-sami-10p/moby,lixiaobing1/docker,x1022as/docker,mike1729/docker,coreos/docker,fcrisciani/docker,ndeloof/docker,jvanz/docker,ffoysal/docker,bonczj/moby-json-file-logger,tklauser/docker,harche/docker,dsheets/moby,miminar/docker,crosbymichael/docker,q384566678/docker,danyalKhaliq10p/moby,lixiaobing10051267/docker,duglin/docker,yosifkit/docker,nawawi/docker,kolyshkin/moby,tophj-ibm/moby,kojiromike/docker,gnailuy/docker,coolljt0725/docker,docker/docker,kolyshkin/moby,KarthikNayak/docker,dgageot/docker,mixja/docker,xuxinkun/docker,madhanrm/docker,Ramzec/docker,jwhonce/docker,rancher/docker,icaoweiwei/docker,yummypeng/docker,KarthikNayak/docker,sarnautov/moby,mtanlee/docker,portworx/docker,msabansal/docker,mtrmac/docker,srust/docker,POLJM242/docker,darrenstahlmsft/moby,mikedougherty/docker,jimjag/docker,ajaymdesai/docker,mahak/docker,whuwxl/docker,HuKeping/docker,ripcurld0/moby,paralin/docker,splunk/docker,jwhonce/docker,thaJeztah/docker,yongtang/docker,ffoysal/docker,ripcurld0/moby,erikstmartin/docker,charleszheng44/moby,nalind/docker,rhatdan/docker,mstanleyjones/docker,mtrmac/docker,prertik/docker,KarthikNayak/docker,catinthesky/docker,shhsu/docker,mohmost12/docker,ibuildthecloud/docker,justincormack/docker,alfred-landrum/docker,thaJeztah/docker,charleszheng44/moby,sterchelen/docker,mtrmac/docker,thtanaka/docker,laijs/docker,hqhq/moby,coreos/docker,AkihiroSuda/docker,gschaetz/moby,nalind/docker,shhsu/docker,michelvocks/docker,moul/docker,gnailuy/docker,tophj-ibm/moby,jthelin/docker,madhanrm/docker,sdurrheimer/docker,johnstep/moby-moby,vdemeester/docker,noironetworks/docker,sarnautov/moby,yosifkit/docker,laijs/docker,YuPengZTE/docker,resin-io/docker,srust/docker,endophage/docker,tonistiigi/docker,sfsmithcha/docker,trebonian/docker,moul/docker,PatrickLang/moby,cpuguy83/docker,maxamillion/docker,jimjag/docker,catinthesky/docker,konstruktoid/docker-1,tklauser/docker,dmcgowan/docker,sterchelen/docker,asbjornenge/docker,pradipd/moby,asbjornenge/docker,xiaods/docker,flavio/docker,justincormack/docker,dims/docker,moypray/docker,scotttlin/docker,estesp/docker,tagomoris/docker,tophj-ibm/docker,kolyshkin/docker,jimjag/docker,x1022as/docker,sarnautov/moby,AkihiroSuda/docker,HuKeping/docker,icaoweiwei/docker,allencloud/docker,kolyshkin/moby,jlhawn/docker,docker/docker,trebonian/docker,whuwxl/docker,noironetworks/docker,kojiromike/docker,jlhawn/docker,nalind/docker,mike1729/docker,HideoYamauchi/docker,AkihiroSuda/docker,sfsmithcha/docker,yosifkit/docker,bearstech/moby,mtesselH/docker,yasiramin10p/moby,michelvocks/docker,xuxinkun/docker,coreos/docker,shhsu/docker,nawawi/docker,PatrickLang/moby,fcrisciani/docker,naveed-jamil-tenpearls/moby,ffoysal/docker,justincormack/docker,AkihiroSuda/docker,moby/moby,HideoYamauchi/docker,erikstmartin/docker,icaoweiwei/docker,thaJeztah/docker,rancher/docker,jameszhan/docker,prertik/docker,kencochrane/docker,dccurtis/docker,mkumatag/docker,kencochrane/docker,moypray/docker,flavio/docker,rhatdan/docker,ibuildthecloud/docker,tonistiigi/docker,SvenDowideit/docker,charleszheng44/moby,jthelin/docker,yummypeng/docker,thtanaka/docker,ColinHebert/docker,pradipd/moby,mstanleyjones/docker,sfsmithcha/docker,paralin/docker,akira-baruah/docker,konstruktoid/docker-1,dperny/docker,msabansal/docker,cpuguy83/docker,maxamillion/docker,tophj-ibm/docker,SvenDowideit/docker,KingEmet/docker,crosbymichael/docker,sdurrheimer/docker,crosbymichael/docker,gjaskiewicz/moby,rhatdan/docker,dsheets/moby,yasiramin10p/moby,gnailuy/docker,dccurtis/docker,ripcurld0/moby,raja-sami-10p/moby,jameszhan/docker,POLJM242/docker,docker/docker,miminar/docker,cpuguy83/docker,jameszhan/docker,dperny/docker,dmcgowan/docker,tagomoris/docker,dims/docker,unclejack/docker,thtanaka/docker,kunalkushwaha/docker,flavio/docker,catinthesky/docker,konstruktoid/docker-upstream,afein/docker,moypray/docker,djs55/docker,mtanlee/docker,KingEmet/docker,allencloud/docker,HuKeping/docker,moby/moby,ibuildthecloud/docker,amatsus/docker,michael-holzheu/docker,jvanz/docker,pramodhkp/moby,KingEmet/docker,pramodhkp/moby,konstruktoid/docker-upstream,lixiaobing10051267/docker,tonistiigi/docker,maxamillion/docker,unclejack/docker,gschaetz/moby,tagomoris/docker,afein/docker,mahak/docker,gjaskiewicz/moby,liaoqingwei/docker