ext/gconf/: Add new gconfaudiosrc and gconfvideosrc elements (needed for gnome-sound...

ext/gconf/: Add new gconfaudiosrc and gconfvideosrc elements (needed for gnome-sound-recorder).

Original commit message from CVS:
* ext/gconf/Makefile.am:
* ext/gconf/gstgconfaudiosrc.c: (gst_gconf_audio_src_base_init),
(gst_gconf_audio_src_class_init), (gst_gconf_audio_src_reset),
(gst_gconf_audio_src_init), (gst_gconf_audio_src_dispose),
(do_toggle_element), (cb_toggle_element),
(gst_gconf_audio_src_change_state):
* ext/gconf/gstgconfaudiosrc.h:
* ext/gconf/gstgconfelements.c: (plugin_init):
* ext/gconf/gstgconfvideosrc.c: (gst_gconf_video_src_base_init),
(gst_gconf_video_src_class_init), (gst_gconf_video_src_reset),
(gst_gconf_video_src_init), (gst_gconf_video_src_dispose),
(do_toggle_element), (cb_toggle_element),
(gst_gconf_video_src_change_state):
* ext/gconf/gstgconfvideosrc.h:
Add new gconfaudiosrc and gconfvideosrc elements
(needed for gnome-sound-recorder).