Make sure gstprivate.h and/or config.h are always included first, otherwise some...

Make sure gstprivate.h and/or config.h are always included first, otherwise some of our defines (like _FILE_OFFSET_BI...

Original commit message from CVS:
Patch by: James Andrewartha <trs80 at tartarus uwa edu au>
* gst/gst.c:
* gst/gstbus.c:
* gst/gstclock.c:
* gst/gstevent.c:
* gst/gstformat.c:
* gst/gstmessage.c:
* gst/gstparse.c:
* gst/gstquery.c:
* gst/gstutils.c:
* gst/parse/Makefile.am:
* libs/gst/base/gstadapter.c:
* libs/gst/base/gstbasesrc.c:
* libs/gst/base/gstpushsrc.c:
* libs/gst/base/gsttypefindhelper.c:
* plugins/elements/gstfakesrc.c:
* plugins/elements/gstidentity.c:
Make sure gstprivate.h and/or config.h are
always included first, otherwise some of our
defines (like _FILE_OFFSET_BITS) might be
redefined in the system headers. Fixes build
on opensolaris (#340016).