I would like to apply the attached patch to python.eclass. This is a
port from Progress overlay.

This patch allows python_mod_optimize to be used in cases where a
different set of python modules is installed depending on the python abi.

For example, dev-python/feedparse-5.1 (not yet in the tree) installs the
_feedparser_sgmllib.py module only in python-3*.

The only difference from Arfrever's original changeset (Progress r1408)
is the "return_status" variable. For some reason, he has renamed this to
"exit_status".

Please provide any comments/questions/objections you may have.