gnu: python2-pyqt-4: Change package name to python2-pyqt.
The package *name* contained the version, makeing it impossible to
install via python2-pyqt@4. Curiously the Pyhton 3 package
(python-pyqt) already had the correct name.
gnu: python-pyqt-5.5: Use non-inherited "configure" phase.
THis is a preperation for the next commit.
gnu: python-pyqt: Fix build by explicitly setting the stubsdir.
This is the updated patch.
