Message 180602 - Python tracker

so here is what I intend to commit.

 - --help now does exit with 0 (same as the python script)
 - removed the abi safety check (always compares the same
   two strings)
 - build the script for the build target, so that it can be
   checked before installing it.
 - install the old script in $(LIBPL). Maybe we can remove
   this later, or add this functionality into sysconfig.