* lang/python/Makefile.am (copystamp): Create one copy per Python
version.
(all-local): Adapt.
(clean-local): Likewise.
(install-exec-local): Likewise.
* lang/python/tests/run-tests.py: Likewise.
--
Currently, we use one copy of the Python module's source to build for
all Python versions. This is problematic, because SWIG writes a
wrapper file into the source tree. Currently, this file works with
both Python 2 and 3, but this is purely by chance.
Improve the situation by creating one copy per Python version so that
SWIG can write version-specific code into each copy.
Signed-off-by: Justus Winter <justus@g10code.com>