tests: write image to current directory by default

This reverts 50b7b70835.

We didn't make Meson create a logs directory, so writing the images fails
because the directory does not exist. If you run a test without Meson, there is
even less expectation that it would write somewhere else than CWD by default.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

tests/weston-test-client-helper.c

@@ -1010,7 +1010,7 @@ output_path(void)
 	char *path = getenv("WESTON_TEST_OUTPUT_PATH");
 
 	if (!path)
-		return "./logs";
+		return ".";
 
 	return path;
 }