[arch-dev-public] [signoff] filesystem 2009.01-1

Changes: - Add locate group to group file - Export PKG_CONFIG_PATH in /etc/profile - Add /etc/modprobe.d/usb-load-ehci-first to address #12009 (the latter needs a small change in mkinitcpio, so this file will also be added to the initramfs, this will fix the issue for people who use the usb and usbinput hooks, I'll do that tonight).