builder: fix cancellation context issue
builder: fix cancellation context issue

Signed-off-by: Tonis Tiigi <c2470c48b2d3312d61f94f18d3a1cd113d1915ad@gmail.com>
konstruktoid/docker-1,bearstech/moby,ibuildthecloud/docker,flavio/docker,x1022as/docker,yosifkit/docker,yosifkit/docker,cpuguy83/docker,docker/docker,mikebrow/docker,AkihiroSuda/docker,yongtang/docker,scotttlin/docker,KarthikNayak/docker,nawawi/docker,paralin/docker,jameszhan/docker,kolyshkin/docker,bearstech/moby,crosbymichael/docker,YuPengZTE/docker,dims/docker,jimjag/docker,jvanz/docker,gnailuy/docker,x1022as/docker,Mokolea/docker,thaJeztah/docker,vdemeester/docker,allencloud/docker,dmcgowan/docker,rremer/moby,Mokolea/docker,justincormack/docker,SvenDowideit/docker,ibuildthecloud/docker,unclejack/docker,yosifkit/docker,trebonian/docker,mikebrow/docker,jvanz/docker,moby/moby,kolyshkin/docker,docker/docker,scotttlin/docker,crosbymichael/docker,Ramzec/docker,laijs/docker,moul/docker,yongtang/docker,cpuguy83/docker,rremer/moby,YuPengZTE/docker,bearstech/moby,dims/docker,pradipd/moby,maxamillion/docker,crosbymichael/docker,KarthikNayak/docker,Mokolea/docker,tmp6154/docker,scotttlin/docker,Ramzec/docker,thaJeztah/docker,kojiromike/docker,SvenDowideit/docker,jwhonce/docker,paralin/docker,konstruktoid/docker-upstream,thaJeztah/docker,dmcgowan/docker,kolyshkin/moby,nalind/docker,paralin/docker,jameszhan/docker,Ramzec/docker,rancher/docker,rancher/docker,rremer/moby,djs55/docker,yosifkit/docker,laijs/docker,AkihiroSuda/docker,cpuguy83/docker,maxamillion/docker,nalind/docker,nawawi/docker,unclejack/docker,gnailuy/docker,rancher/docker,justincormack/docker,mahak/docker,mahak/docker,docker/docker,johnstep/moby-moby,laijs/moby,cpuguy83/docker,kojiromike/docker,flavio/docker,djs55/docker,jlhawn/docker,Ramzec/docker,konstruktoid/docker-upstream,djs55/docker,yongtang/docker,mikebrow/docker,justincormack/docker,trebonian/docker,dims/docker,ibuildthecloud/docker,Mokolea/docker,gnailuy/docker,nawawi/docker,ibuildthecloud/docker,moul/docker,thaJeztah/docker,estesp/docker,unclejack/docker,jwhonce/docker,tmp6154/docker,KarthikNayak/docker,estesp/docker,trebonian/docker,jthelin/docker,johnstep/moby-moby,nalind/docker,vdemeester/docker,pradipd/moby,moby/moby,jimjag/docker,mahak/docker,moul/docker,kolyshkin/moby,jlhawn/docker,mahak/docker,estesp/docker,nawawi/docker,jwhonce/docker,x1022as/docker,SvenDowideit/docker,jvanz/docker,laijs/moby,laijs/docker,moul/docker,jlhawn/docker,kojiromike/docker,tmp6154/docker,bearstech/moby,dmcgowan/docker,jthelin/docker,allencloud/docker,konstruktoid/docker-upstream,flavio/docker,kolyshkin/moby,paralin/docker,moby/moby,AkihiroSuda/docker,ibuildthecloud/docker,gnailuy/docker,YuPengZTE/docker,maxamillion/docker,konstruktoid/docker-1,allencloud/docker,konstruktoid/docker-1,trebonian/docker,moby/moby,AkihiroSuda/docker,jimjag/docker,johnstep/moby-moby,pradipd/moby,laijs/moby,nalind/docker,konstruktoid/docker-upstream,jameszhan/docker,jimjag/docker,vdemeester/docker,flavio/docker