[packages] facter: add new package

This patch is for the "facter" utility which allows sysadmins to extract
information from their systems.

Signed-off-by: Kyle Anderson <kyle@xkyle.com>

git-svn-id: svn://svn.openwrt.org/openwrt@36549 3c298f89-4303-0410-b956-a3cf2f4a3e73