builder: enable add-host for buildkit
builder: enable add-host for buildkit

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