multipath-tools: fix build warning

NOTE: Executing RunQueue Tasks
 WARNING: QA Issue: Symlink /lib/libmpathpersist.so in multipath-tools-dev points to TMPDIR [symlink-to-sysroot]
 NOTE: Tasks Summary: Attempted 1604 tasks of which 1591 didn't need to be rerun and all succeeded.

Signed-off-by: Bian Naimeng <biannm@cn.fujitsu.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>