sys/glsink/: Split out gl-related code into a separate file with a sensible API.  Major cleanup.  Still crashes occas...

Original commit message from CVS:
* sys/glsink/Makefile.am:
* sys/glsink/glimagesink.c:
* sys/glsink/glvideo.c:
* sys/glsink/glvideo.h:
Split out gl-related code into a separate file with a
sensible API.  Major cleanup.  Still crashes occasionally
due to different threads touching bits at the same time.
5 files changed