test: Clean up memory leaks

A few leaks in the test code were found when running linput-test-suite
with the -fsanitize=address option enabled. Clean up these leaks so that
we can more clearly see real issues.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

test/test-quirks.c

@@ -940,6 +940,7 @@ test_attr_parse(struct litest_device *dev,
 		ck_assert(func(q, which, data));
 		ck_assert(quirks_has_quirk(q, which));
 		quirks_unref(q);
+		quirks_context_unref(ctx);
 		result = true;
 	} else {
 		result = false;

test/test-tablet.c

@@ -1093,6 +1093,7 @@ START_TEST(proximity_out_clear_buttons)
 			if (libinput_event_get_type(event) ==
 			    LIBINPUT_EVENT_TABLET_TOOL_PROXIMITY) {
 				have_proximity = true;
+				libinput_event_destroy(event);
 				break;
 			}