Testcase i_innodb.innodb-alter-restart.test fails on some Windows platforms

possibly since it was introduced in the patch for Bug#16720368 around 
2013-04-30.  This fix is simply to adjust the mtr.add_suppression() lines
in the testcase and to add a missing "\n" in the error message.

Approved by Marko in RB 3746

storage/innobase/fil/fil0fil.c

@@ -3531,7 +3531,7 @@ fil_load_single_table_tablespace(
 
 		if (check_msg) {
 			fprintf(stderr,
-				"InnoDB: Error: %s in file %s",
+				"InnoDB: Error: %s in file %s\n",
 				check_msg, filepath);
 			goto func_exit;
 		}