pacman: Work around crash introduced upstream

https://bugs.archlinux.org/task/42736
pacman: Bump pkgrel
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