Move macros.pybytecompile in here from python3X-devel
macros.pybytecompile: Detect Python version through sys.version_info
...instead of guessing from the executable name.
This should make it work on EPEL7 as well where we ship 3.4 and 3.6
https://bugzilla.redhat.com/show_bug.cgi?id=1599809