Add -m (for match) switch to test.py.

Usage: test.py -m rtc/

test.py

@@ -337,7 +337,7 @@ def run_tests(test_list, args):
   if len(test_filenames):
     # TODO: Maybe --compare should detect --graphics?
     cmdline = [PPSSPP_EXE, '--compare', '--timeout=' + str(TIMEOUT), '@-']
-    cmdline.extend([i for i in args if i not in ['-g']])
+    cmdline.extend([i for i in args if i not in ['-g', '-m']])
 
     c = Command(cmdline, '\n'.join(test_filenames))
     c.run(TIMEOUT * len(test_filenames))
@@ -364,6 +364,8 @@ def main():
       tests = tests_good
     else:
       tests = tests_next + tests_good
+  elif '-m' in args:
+    tests = [i for i in tests_next + tests_good if i.startswith(tests[0])]
 
   run_tests(tests, args)