Updates library jni portaudio for Linux-32. Includes stdin.h and corrects warning about intptr_t in net_java_sip_communicator_impl_neomedia_portaudio_PortAudio.c (as suggested by Lyubomir Marinov).

Commits an initial version of the libjitsi library which should be fully functional with respect to neomedia/MediaService and should be usable with and without OSGi.