LU-1199 build: Fix paths after move to contrib dir

LU-1199 build: Fix paths after move to contrib dir

Fix usage of lbuild's support files from the directory where
lbuild and support files are realy palced.

Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Change-Id: Ie0bb4f98ee0adcbf1643b15a9d131f69a47b7360
Reviewed-on: http://review.whamcloud.com/6497
Tested-by: Hudson
Reviewed-by: Christopher J. Morrone <chris.morrone.llnl@gmail.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Minh Diep <minh.diep@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>