[19.03 backport] Bump golang 1.12.5#1875

tiborvass merged 1 commit intodocker:19.03docker/cli:19.03from

thaJeztah:19.03_backport_bump-golang-1.12.5thaJeztah/cli:19.03_backport_bump-golang-1.12.5Copy head branch name to clipboard