Log Message:
- enable shared libraries
- do not build the python bindings, they're python version dependant
  and should be built separately
- move common parts from Makefile into Makefile.common for use by
  the python binding package Makefile
- add a patch for python/setup.py to add smsd.c to the sources
  which was obviously forgotten by the gammu team because they are
  building the extension with cmake.
- add a buildlink3.mk for the python bindings package

From Joachim König in private mail.
PKGREVISION++.

While here, make sure that some optional dependencies are not found
and that the bash completion script is not installed.