dmraid: add patch to build with format hardening

pkgs/os-specific/linux/dmraid/default.nix

···
     sha256 = "0m92971gyqp61darxbiri6a48jz3wq3gkp8r2k39320z0i6w8jgq";
   };
 
+  patches = [ ./hardening-format.patch ];
+
   postPatch = ''
     sed -i 's/\[\[[^]]*\]\]/[ "''$''${n##*.}" = "so" ]/' */lib/Makefile.in
   '';

pkgs/os-specific/linux/dmraid/hardening-format.patch

···
+--- a/1.0.0.rc16/lib/events/libdmraid-events-isw.c	2016-01-29 05:16:57.455425454 +0000
++++ b/1.0.0.rc16/lib/events/libdmraid-events-isw.c	2016-01-29 05:17:55.520564013 +0000
+@@ -838,13 +838,13 @@
+ 
+ 	sz = _log_all_devs(log_type, rs, NULL, 0);
+ 	if (!sz) {
+-		syslog(LOG_ERR, msg[0]);
++		syslog(LOG_ERR, "%s", msg[0]);
+ 		return;
+ 	}
+ 
+ 	str = dm_malloc(++sz);
+ 	if (!str) {
+-		syslog(LOG_ERR, msg[1]);
++		syslog(LOG_ERR, "%s", msg[1]);
+ 		return;
+ 	}
+