pacman: Work around crash introduced upstream

https://bugs.archlinux.org/task/42736
pacman: Bump pkgrel
msys2-unlocker: First commit, WIP
msys2-unlocker: Update (WIP)
msys2-updater: Minor fix (WIP)
pkg-config: Rebuild.
msys2-unlocker: Minor reorgs + clang-format (WIP)
Merge pull request #120 from elieux/pacman-fs42736-workaround

pacman: Work around crash introduced upstream
lemon: Rebuild
busybox: Remove from base group
filesystem: Optimize first MSYS2 run.
util-linux: Fix packages group
man-db: Update to 2.7.1
msys2-installer: Add missing icon. Execute autorebase for 32-bit installer
msys2-unlocker: Still very WIP
libffi: Update to 3.2.1
mercurial: Update ot 3.2.1
msys2-runtime: update to git SHA [fbf8a84]
ruby: Update to 2.1.5
crosstool-ng: Generate checksums