sys/v4l/: Added a copy mode to v4lsrc where it will output a copied version of its...

sys/v4l/: Added a copy mode to v4lsrc where it will output a copied version of its internal hardware buffer.

Original commit message from CVS:
* sys/v4l/gstv4lmjpegsrc.c: (gst_v4lmjpegsrc_get):
* sys/v4l/gstv4lsrc.c: (gst_v4lsrc_sync_mode_get_type),
(gst_v4lsrc_class_init), (gst_v4lsrc_init), (gst_v4lsrc_get_fps),
(gst_v4lsrc_get), (gst_v4lsrc_set_property),
(gst_v4lsrc_get_property):
* sys/v4l/gstv4lsrc.h:
Added a copy mode to v4lsrc where it will output a copied version
of its internal hardware buffer.
Fix the wrong FLAG_SET usage. The flags are integers, not bits, you
can't | them.