Generated files were generated using 'ninja -C build update-code'
except for libgstfft, which had to be updated manually
(see issue #25).
Note: with these changes, building on MS Windows will require
the msvc compiler - mingw will no longer work.
Hide the following method that were previously totally broken and
now are wrongly auto generated (and fail to build):
gst_rtsp_message_parse_auth_credentials
gst_audio_ring_buffer_prepare_read
