[stable] Backport fixes to build-manifest#56960

Merged

bors merged 3 commits intorust-lang:stablefrom

pietroalbini:gpg-stable

Dec 19, 2018

Commits on Dec 18, 2018

Build manifest tool on mingw-check builder

Mark-Simulacrum
authored and
pietroalbini
committed
Fix gpg signing in manifest builder

Mark-Simulacrum
authored and
pietroalbini
committed
Add `--pinentry-mode=loopback` to deployment script

alexcrichton
authored and
pietroalbini
committed