Add an end-of-test marker to ease merges

mysql-test/r/partition_alter.result

@@ -165,3 +165,4 @@ select * from t1 partition (p0);
 k	x
 1	2000-01-01 00:00:00.000000
 drop table t1;
+# End of 10.2 tests

mysql-test/t/partition_alter.test

@@ -151,3 +151,5 @@ insert into t1 (k, x) values (1, '2000-01-01 00:00'), (2, '2000-01-01 00:01');
 alter table t1 drop key u, algorithm=inplace;
 select * from t1 partition (p0);
 drop table t1;
+
+--echo # End of 10.2 tests