LU-5114 utils: Fix autoconf warning

LU-5114 utils: Fix autoconf warning

Fix mount_osd_ldiskfs_LDADD autoconf warning.  This corrects a fix
left out of commit 0d77156572c2b77581f01d960c0e5738b369de6a.

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Change-Id: I2815f093951c215a8c92678348444cbd18297e25
Reviewed-on: http://review.whamcloud.com/12005
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>