tools/replay: rmdir, not unlink for directories

And if the directory happens to be nonempty, well, maybe anyother
libinput reply is running so let's ignore that.

Fixes: cdfe34f62a ("replay: use the runtime quirks for our replay quirks")
Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1330>

tools/libinput-replay.py

@@ -410,7 +410,13 @@ def main():
     finally:
         if quirks_file:
             quirks_file.unlink()
-            quirks_file.parent.unlink()
+            try:
+                quirks_file.parent.rmdir()
+            except OSError as e:
+                import errno
+
+                if e.errno != errno.ENOTEMPTY:
+                    raise e
 
 
 if __name__ == "__main__":