LU-2800 llite: introduce local getname()

LU-2800 llite: introduce local getname()

Commit 8e377d15 (v3.7) unexported getname and putname. Although
getname was re-exported, putname was not. All we really need is
something to to allocate a buffer and copy it from userspace so
let's just use our own version. The down size is that we lose
the audit support in the original getname.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Change-Id: If44cd9f9d14f26f220d5f0c52e8b804a49d3cf92
Reviewed-on: http://review.whamcloud.com/5781
Tested-by: Hudson
Reviewed-by: Peng Tao <bergwolf@gmail.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Alexey Shvetsov <alexxy@gentoo.org>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>