python-pyqt: Update to 4.11.3.

The configure.py script now has support for cross compiling. This
simplified the recipe substantially.

The recipe was tested with gnuradio-companion on the zedboard and
ettus-e300. This is the first time we have been able to use grc with
pyqt built with OpenEmbedded.

Build tested on armv7, x86, x86_64 and mips.

Dropped patches from previous versions.

Signed-off-by: Philip Balister <philip@balister.org>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>