Fix Python build issues on Ubuntu 12.0.4

Ubuntu 12.0.4 uses lib/x86_64-linux-gnu for its libraries.
This path needs to be added to the search paths in setup.py.
Also patch setup.py is currently not being used, it needs to
be copied over.
Merge remote-tracking branch 'origin/ubuntu-12.0.4-python-fix' into devel-master

* origin/ubuntu-12.0.4-python-fix:
  Fix Python build issues on Ubuntu 12.0.4

Conflicts:
	CMake/cdat_modules_extra/python_setup.py.in
	CMake/python_patch_step.cmake.in