Fix packaging byte-compilation to comply with PEP 3147 (#11254).

I want to replace custom byte-compiling function with calls to
compileall before 3.3b1, but in the short term it’s good to have this
fixed.

Adapted from the distutils patch by Jeff Ramnani.  I tested with -B, -O
and -OO; test_util and test_mixin2to3 fail in -O mode because lib2to3
doesn’t support it.
5 files changed