Ignore all surface comparison output files in the testautomation directory

.gitignore

@@ -66,8 +66,7 @@ VisualC/tests/gamepadmap/button.bmp
 VisualC/tests/gamepadmap/gamepadmap.bmp
 VisualC/tests/gamepadmap/gamepadmap_back.bmp
 VisualC/tests/loopwave/sample.wav
-VisualC/tests/testautomation/CompareSurfaces0001_Reference.bmp
-VisualC/tests/testautomation/CompareSurfaces0001_TestOutput.bmp
+VisualC/tests/testautomation/*.bmp
 VisualC/tests/testgamepad/axis.bmp
 VisualC/tests/testgamepad/button.bmp
 VisualC/tests/testgamepad/gamepadmap.bmp