buildscripts: Don't install libtool control files.
fsln.sh: Add libdb-devel files.
buildscripts/lsmash.sh: Update patches.
dotfiles/.vimrc: Now, MSYS2 vim supports +clipboard.
gcc_build: Update patches, which are related to mingw printf.
etc/pacman.conf: ignore pkg-conf
Update buildscripts

    - Cleanup scripts.
    - Update patches.
    - Delete time_r.patch for ffmpeg. Now, *time_r are reimplemented as functions.