[Proposal] adjustment of rank by command line option
Submitted by Justin Kim
In case of special element with rank zero, there's no way to deploy by gst-launch and autoplugging.
If ranks can be set by an option, we can do test simply by command line tool even plugins has zero rank.
I suggest "--gst-rank" option for gst_init. However, I failed to find a proper location for this feature so I just modified "gst.c".