libsemanage: query for python site-packages dir directly

Use the python interpreter to find the install directory, like commit
8162f10e670d ("libselinux: query for python site-packages dir directly")
did for libselinux.

While at it, do not install semanage.py (generated by SWIG) with
executable permission bits.

Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
1 file changed