bump to qt 5.0.1

a few changes:
- adding the following configure switches "-opengl desktop", "-no-egl", and
  "-no-eglfs", as suggested by user brcha, which reported problems running
  Qt5 with proprietary drivers;

- added mesa as dependency (32-bit build needed it)

- qmldir changed to "/usr/lib/qt5/imports", as suggested by user rferrazz

Signed-off-by: Sergio Correia <sergio@correia.cc>