[18.09 backport] builder / buildkit updates#1438

Merged

tiborvass merged 4 commits intodocker:18.09from

thaJeztah:18.09_backport_hide-buildkit-flags-if-not-enabled

Oct 11, 2018

Commits on Oct 11, 2018

Bump buildkit and dependencies to 39404586a50d1b9d0fb1c578cf0f4de7bdb7afe5
thaJeztah
committed
bump up buildkit

AkihiroSuda
authored and
thaJeztah
committed
build: add SSH agent socket forwarder (`docker build --ssh $SSHMOUNTID=$SSH_AUTH_SOCK`)

AkihiroSuda
authored and
thaJeztah
committed
build: only show buildkit-specific flags if buildkit is enabled

Tibor Vass
authored and
thaJeztah
committed