[arch-dev-public] [signoff] mkinitcpio 0.5.20-1

I was planning so many things on mkinitcpio which I didn't do yet, so here is a quickfix for 2.6.28 usage: - Add ext4 detection to filesystem hook - Rename ide-disk to ide-gd_mod in the ide hook - Depend on the new klibc 1.5.14-2 so fstype and kinit can detect ext4 properly.