[test] fix failure of TestBuildLabelsOverride on Windows
[test] fix failure of TestBuildLabelsOverride on Windows

TestBuildLabelsOverride was consistently failing due to "Windows does not support FROM scratch" error

Signed-off-by: Akihiro Suda <ea940da7e429af3d0d0c18296cabd0112a36bad5@lab.ntt.co.jp>

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