boot-monitor: fix build warning using gcc 4.9 tool chain
-rwxr-xr-x 1633 COPYING
drwxr-xr-x - Docs
-rw-r--r-- 4229 Makefile
drwxr-xr-x - image
-rw-r--r-- 2844 makedefs
drwxr-xr-x - non-sec
drwxr-xr-x - sec