LU-5030 utils: fix lnet/utils/debug.c compile issue

LU-5030 utils: fix lnet/utils/debug.c compile issue

The source file debug.c will fail to compile if gcc
uses the flag -Werror=format-security. The solution
is to add "%s" to cfs_get_param_path().

Change-Id: If0fb438010f692e11432aa1539218d16c9e4548e
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: http://review.whamcloud.com/17900
Tested-by: Jenkins
Reviewed-by: Ryan Haasken <haasken@cray.com>
Reviewed-by: Frank Zago <fzago@cray.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>