Make sure "mdmon" doesn't get called "@dmon".

The Anaconda installer (via its "loader" program) will try to kill
many processes at shutdown, but not "mdmon".

However when mdadm runs mdmon in the Anaconda environment, mdmon
sets argv[0][0] to '@' resulting in "@dmon" which confuses
"loader".

So change mdadm to set argv[0] to a path so that mdmon becomes e.g.
  "@usr/sbin/mdmon"
which "loader" will recognise as being "mdmon".

Reported-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>

util.c

@@ -1691,7 +1691,7 @@ int start_mdmon(char *devnm)
 	char *paths[4] = {
 		pathbuf,
 		"/sbin/mdmon",
-		"mdmon",
+		"./mdmon",
 		NULL
 	};
 
@@ -1759,7 +1759,7 @@ int start_mdmon(char *devnm)
 
 		for (i = 0; paths[i]; i++)
 			if (paths[i][0]) {
-				execl(paths[i], "mdmon",
+				execl(paths[i], paths[i],
 				      devnm, NULL);
 			}
 		exit(1);