gstreamer1: revert addition of --disable-option-parsing
The --disable-option-parsing flag breaks applications (such as dmapd)
that assume gst_init_get_option_group() initializes GStreamer. The
gst_init_get_option_group() function returns NULL and does nothing to
initialize GStreamer in this case. The --disable-option-parsing is meant
only for very specialized instances.
See also https://gitlab.freedesktop.org/gstreamer/gstreamer/issues/388.
Signed-off-by: W. Michael Petullo <mike@flyn.org>