Original commit message from CVS:
Convert everything from GstAtomicInt to g_atomic_int_*, and
remove gstatomic.
* gst/Makefile.am:
* gst/gstatomic.c:
* gst/gstatomic.h:
* gst/gstatomic_impl.h:
* gst/gstbuffer.c:
* gst/gstcaps.c:
* gst/gstcaps.h:
* gst/gstclock.c:
* gst/gstclock.h:
* gst/gstdata.c:
* gst/gstdata.h:
* gst/gstdata_private.h:
* gst/gstevent.c:
* gst/gstinfo.c:
* gst/gstinfo.h:
* gst/gstmessage.c:
* gst/gstobject.c:
* gst/gstobject.h:
* gst/gststructure.c:
* gst/gststructure.h:
* gst/gstutils.c: Add gst_atomic_int_set() compaitibility function.
* gst/gstutils.h: