Added a new Lua library name to try in plugins

Added a new Lua library name to try loading with dlopen() in Lua
based plugins.

src/plugins/job_submit/lua/job_submit_lua.c

@@ -696,7 +696,8 @@ int init (void)
 	 *   by any lua scripts.
 	 */
 	if (!dlopen("liblua.so", RTLD_NOW | RTLD_GLOBAL)) {
-		if (!dlopen ("liblua5.1.so", RTLD_NOW | RTLD_GLOBAL)) {
+		if (!dlopen ("liblua5.1.so",   RTLD_NOW | RTLD_GLOBAL) &&
+		    !dlopen ("liblua5.1.so.0", RTLD_NOW | RTLD_GLOBAL))
 			return (error("Failed to open liblua.so: %s",
 				      dlerror()));
 		}

src/plugins/proctrack/lua/proctrack_lua.c

@@ -231,7 +231,8 @@ int init (void)
 	 *   by any lua scripts.
 	 */
 	if (!dlopen ("liblua.so", RTLD_NOW | RTLD_GLOBAL)) {
-		if (!dlopen ("liblua5.1.so", RTLD_NOW | RTLD_GLOBAL))
+		if (!dlopen ("liblua5.1.so",   RTLD_NOW | RTLD_GLOBAL) &&
+		    !dlopen ("liblua5.1.so.0", RTLD_NOW | RTLD_GLOBAL))
 			return (error("Failed to open liblua.so: %s",
 				      dlerror()));
 	}