LU-5275 build: add LPROCFS to the deprecated symbol list

LU-5275 build: add LPROCFS to the deprecated symbol list

In contrib/scripts/checkpatch.pl deprecate LPROCFS and suggest use of
CONFIG_PROC_FS instead.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: I801acd18b97c5c1aa474aa3960c9bfc0758e3652
Reviewed-on: http://review.whamcloud.com/13463
Tested-by: Jenkins
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>