tests: Add basic tests for gobject-query utility

At the moment these tests basically just ensure that the program’s
compiled properly and doesn’t crash on startup. They don’t check
functionality very deeply.

But they’re a start.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

gobject/tests/meson.build

@@ -102,6 +102,7 @@ endif
 
 python_tests = [
   'genmarshal.py',
+  'gobject-query.py',
   'mkenums.py',
 ]