pyqt: Generate PyQt4.pyqtconfig

This is no longer generated by the new (recommended) configure-ng.py but
some older projects (like PyQWT) still need that file, so we first
run configure.py and copy over the generated pyqtconfig.py manually.
Then, we normally run and build with configure-ng.py.

Fixes #21984
inkscape: depends_on hicolor-icon-theme

As in the discussion [1] that theme is recommended to avoid
a warning if incskape.

[1]: https://github.com/mxcl/homebrew/pull/12989#issuecomment-23731355