python bindings: activate thread-safety code generation
python bindings: activate thread-safety code generation

The Parameter Framework may spawn a thread listening to request for command
execution. In this case, whenever a command produces a log, a callback function
provided by the client is called. When the client is a python script using the
python bindings, this causes a python function to be called in a different
context than the main thread. This can only work safely if a specific lock is
held before hand; see

    https://docs.python.org/2/c-api/init.html#non-python-created-threads

Fortunately, SWIG can generate the corresponding code automatically using

    %module(threads=1, ...) mymodule

Signed-off-by: David Wagner <60228a510f9a76940848fa2d29321fc4edfc2119@intel.com>

dbrageul/parameter-framework,zchokri/parameter-framework,mgaio/parameter-framework,soaresm/parameter-framework,miguelgaio/parameter-framework,01org/parameter-framework,krocard/parameter-framework,sdnnfv/parameter-framework,clero/parameter-framework,miguelgaio/parameter-framework,clero/parameter-framework,zchokri/parameter-framework,anwarMov/parameter-framework,sdnnfv/parameter-framework,anwarMov/parameter-framework,zchokri/parameter-framework,01org/parameter-framework,krocard/parameter-framework,dbrageul/parameter-framework,sdnnfv/parameter-framework,wzairix/parameter-framework,clero/parameter-framework,dbrageul/parameter-framework,dawagner/parameter-framework,wzairix/parameter-framework,krocard/parameter-framework,wzairix/parameter-framework,dawagner/parameter-framework,miguelgaio/parameter-framework,soaresm/parameter-framework,mgaio/parameter-framework,dawagner/parameter-framework,soaresm/parameter-framework,01org/parameter-framework,anwarMov/parameter-framework,mgaio/parameter-framework