Add cross-compilation testing to .travis.yml
Add cross-compilation testing to .travis.yml

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)

navidshaikh/runc,justincormack/runc,nkwilson/runc,rhatdan/runc,mheon/libcontainer,ChengTiesheng/runc,ycaihua/runc,boucher/runc,mrunalp/runc,HuKeping/runc,mrunalp/libcontainer,navidshaikh/runc,estesp/runc,docker/runc,icecrime/libcontainer,LTD-Beget/libcontainer,stefanberger/runc,w4ngyi/libcontainer,sallyom/runc,abduld/runc,docker/libcontainer,runcom/runc,w4ngyi/libcontainer,whuwxl/libcontainer,shakamunyi/libcontainer,ycaihua/runc,unclejack/libcontainer,dqminh/runc,balajibr/runc,estesp/libcontainer,kolyshkin/runc,avagin/libcontainer,ycaihua/libcontainer,crosbymichael/runc,meihuabo/runc,intfrr/runc,cloudfoundry-incubator/runc,LK4D4/runc,zenlinTechnofreak/runc,wangkirin/runc,dieface/runc,jwuwork/runc,whuwxl/libcontainer,kimh/runc,dqminh/runc,jhjeong-kr/runc,icecrime/libcontainer,ZJU-SEL/libcontainer,crosbymichael/runc,jhjeong-kr/runc,runcom/libcontainer,runcom/runc,mrunalp/libcontainer,kimh/runc,willmtemple/runc,shenxiaochen/libcontainer,zhangyancoder/libcontainer,wcwxyz/runc,keloyang/libcontainer,dieface/runc,mapk0y/runc,inatatsu/runc,dieface/runc,clnperez/runc,albertoleal/runc,mikebrow/runc,thaJeztah/libcontainer,runcom/runc,estesp/libcontainer,cyphar/runc,mheon/runc,Mashimiao/libcontainer,rhatdan/runc,whosthatknocking/runc,mikebrow/runc,Mashimiao/libcontainer,willmtemple/runc,jhjeong-kr/runc,ZJU-SEL/libcontainer,docker/runc,stefanberger/runc,maxamillion/runc,ZJU-SEL/libcontainer,wking/runc,carlye566/runc,mheon/runc,LTD-Beget/libcontainer,booyaa/runc,haijunTan/runc,mrunalp/runc,booyaa/runc,lizf-os/runc,subuser-security/runc,tangkun75/libcontainer,mheon/libcontainer,haijunTan/runc,hqhq/libcontainer,wangkirin/runc,inatatsu/runc,InformatiQ/runc,Microsoft/libcontainer,avagin/runc,thaJeztah/libcontainer,opencontainers/runc,wcwxyz/runc,rootfs/runc,docker/libcontainer,YujiOshima/runc,estesp/runc,subuser-security/runc,intfrr/runc,gitido/runc,unclejack/libcontainer,vbatts/runc,chenchun/runc,Microsoft/libcontainer,dqminh/runc,hxfeng/runc,aidanhs/runc,jwuwork/runc,rajasec/runc,opencontainers/runc,rootfs/runc,crosbymichael/libcontainer,mYmNeo/runc,jhowardmsft/runc,opencontainers/runc,HardikDR/runc,nkwilson/runc,justincormack/runc,markllama/runc,rsampaio/runc,runcom/libcontainer,coolljt0725/runc,jhowardmsft/runc,dqminh/libcontainer,carlye566/runc,mikebrow/runc,coolljt0725/runc,kolyshkin/runc,runcom/libcontainer,crosbymichael/libcontainer,avagin/runc,nkwilson/runc,chenchun/runc,gwoo/runc,markllama/runc,keloyang/runc,kolyshkin/runc,InformatiQ/runc,aidanhs/runc,keloyang/libcontainer,avagin/runc,cloudfoundry-incubator/runc,cxxly/runc,estesp/runc,LK4D4/runc,unclejack/libcontainer,Microsoft/libcontainer,balajibr/runc,liuwharton/runc,abduld/runc,shenxiaochen/libcontainer,haijunTan/runc,mheon/runc,zenlinTechnofreak/runc,gitido/runc,hqhq/runc,xiaochenshen/runc,axsh/runc,vbatts/runc,boucher/libcontainer,booyaa/runc,han-wang/runc,vbatts/runc,talwai/runc,sunyuan3/runc,albertoleal/runc,HardikDR/runc,wking/runc,hxfeng/runc,sallyom/runc,opencontainers/runc,rhatdan/libcontainer,carlye566/runc,shishir-a412ed/runc,wking/runc,w4ngyi/libcontainer,whuwxl/libcontainer,stefanberger/runc,xiaochenshen/runc,wcwxyz/runc,jhowardmsft/runc,keloyang/libcontainer,talwai/runc,rhatdan/libcontainer,thaJeztah/libcontainer,shakamunyi/libcontainer,markllama/runc,ekuric/runc,kolyshkin/runc,fabiokung/runc,mYmNeo/runc,coolljt0725/runc,marcosnils/runc,crosbymichael/runc,SaiedKazemi/libcontainer-criu,estesp/libcontainer,inatatsu/runc,marcosnils/runc,shishir-a412ed/runc,rhatdan/runc,YujiOshima/runc,jwuwork/runc,laijs/runc,HuKeping/runc,kimh/runc,boucher/runc,calavera/runc,icecrime/libcontainer,hxfeng/runc,ddnbgroup/runc,boucher/libcontainer,cloudfoundry-incubator/runc,han-wang/runc,han-wang/runc,rajasec/runc,ddnbgroup/runc,ChengTiesheng/runc,adrianreber/runc,chenchun/runc,tangkun75/libcontainer,boucher/libcontainer,maxamillion/runc,BrickXu/libcontainer,tangkun75/libcontainer,marcosnils/runc,ycaihua/runc,ycaihua/libcontainer,mYmNeo/runc,keloyang/runc,cyphar/runc,ekuric/runc,intfrr/runc,gitido/runc,axsh/runc,clnperez/runc,hqhq/libcontainer,zhangyancoder/libcontainer,dqminh/runc,milosgajdos83/libcontainer-milosgajdos83,justincormack/runc,balajibr/runc,shenxiaochen/libcontainer,willmtemple/runc,WeiZhang555/runc,clnperez/runc,ZJU-SEL/runc,zenlinTechnofreak/runc,sunyuan3/runc,rhatdan/libcontainer,WeiZhang555/runc,maxamillion/runc,axsh/runc,cxxly/runc,lizf-os/runc,shakamunyi/libcontainer,aidanhs/runc,liuwharton/runc,calavera/runc,rsampaio/runc,InformatiQ/runc,lizf-os/runc,fabiokung/runc,BrickXu/libcontainer,YujiOshima/runc,LTD-Beget/libcontainer,adrianreber/runc,laijs/runc,ZJU-SEL/runc,navidshaikh/runc,mrunalp/runc,meihuabo/runc,cxxly/runc,hqhq/runc,ZJU-SEL/runc,albertoleal/runc,whosthatknocking/runc,Mashimiao/libcontainer,ddnbgroup/runc,HardikDR/runc,ekuric/runc,dqminh/libcontainer,fabiokung/runc,avagin/libcontainer,crosbymichael/libcontainer,meihuabo/runc,cyphar/runc,adrianreber/runc,subuser-security/runc,keloyang/libcontainer,SaiedKazemi/libcontainer-criu,xiaochenshen/runc,mapk0y/runc,sallyom/runc,keloyang/runc,docker/libcontainer,mapk0y/runc,dqminh/libcontainer,milosgajdos83/libcontainer-milosgajdos83,laijs/runc,calavera/runc,HuKeping/runc,whosthatknocking/runc,rajasec/runc,SaiedKazemi/libcontainer-criu,rhatdan/runc,docker/runc,ycaihua/libcontainer,liuwharton/runc,WeiZhang555/runc,talwai/runc,mheon/libcontainer,wangkirin/runc,abduld/runc,hqhq/libcontainer,LK4D4/runc,avagin/libcontainer,ChengTiesheng/runc,mrunalp/libcontainer,rootfs/runc,zhangyancoder/libcontainer,sunyuan3/runc,BrickXu/libcontainer,shishir-a412ed/runc,hqhq/runc,boucher/runc,rsampaio/runc