Add f2fs file system support (#695396)

Only supports detection and creation of f2fs file systems.  Requires
f2fs-tools and a blkid with f2fs support, util-linux > 2.22.2.

f2fs-tools v1.1.0 only supports file system creation.
Currently requires util-linux directly from the git repository as f2fs
support was only committed on 5 Feb 2013 and it has not yet been
released.

Closes Bug #695396 - Please apply f2fs patch