python: improve support for modern python (CPython 3.2 and PyPy) This fixes automake bug#8847. * m4/python.m4 (AM_PATH_PYTHON): Add python3.3 to _AM_PYTHON_INTERPRETER_LIST. * lib/py-compile: Fix compiled filenames for PEP-3147, currently implemented in CPython 3.2 and newer. Do not create '.pyo' files for PyPy. Copyright-paperwork-exempt: yes Signed-off-by: Yaakov Selkowitz <yselkowitz@users.sourceforge.net> Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>