Log Message:
lilv: Update to 0.24.6. Convert to waf.mk.

lilv (0.24.6) stable;

  * Add more strict error detection when storing plugin state properties
  * Add option to override LV2_PATH in applications
  * Don't print errors when saving state if correct links already exist
  * Fix GCC8 warnings
  * Fix creating directories across drives on Windows
  * Fix issues with loading state with saved files from the model
  * Fix memory errors and Python 3.4+ compatibility in Python bindings
  * Fix unit tests on Windows
  * Make Python bindings more Pythonic