mysql-test-run.pl now creates an innodb data file of 10M:autoextend instead of 128M:autoextend.

This is faster under gdb/valgrind (this should speed up work of people who have to run
a simple test 50 times to do debugging). Running without --big, which is the default, InnoDB tests
take at most 18MB so 128 was overkill. Running with --big, InnoDB tests take 450MB so 128
was not enough anyway.

mysql-test/mysql-test-run.pl

@@ -2561,7 +2561,7 @@ sub mysqld_arguments ($$$$$$) {
     mtr_add_arg($args, "%s--server-id=%d", $prefix, $id);
     mtr_add_arg($args, "%s--socket=%s", $prefix,
                 $master->[$idx]->{'path_mysock'});
-    mtr_add_arg($args, "%s--innodb_data_file_path=ibdata1:128M:autoextend", $prefix);
+    mtr_add_arg($args, "%s--innodb_data_file_path=ibdata1:10M:autoextend", $prefix);
     mtr_add_arg($args, "%s--local-infile", $prefix);
     mtr_add_arg($args, "%s--datadir=%s", $prefix,
                 $master->[$idx]->{'path_myddir'});