gconf/Makefile.am: Fix for non-GNU make

gconf/Makefile.am: Fix for non-GNU make

Original commit message from CVS:
* gconf/Makefile.am: Fix for non-GNU make
* gst-libs/gst/Makefile.am: Change directory order to handle
GstPlay linking with gstinterfaces
* gst-libs/gst/audio/make_filter: make use of tr portable
* gst-libs/gst/play/Makefile.am: Add intended \
* gst-libs/gst/xwindowlistener/xwindowlistener.c:
(gst_xwin_set_clips): Switch to ISO variadic macro. Use a
function prototype instead of void *.
* gst/ffmpegcolorspace/gstffmpegcodecmap.c: Switch to ISO variadic
macro.
* gst/ffmpegcolorspace/gstffmpegcolorspace.c:
(gst_ffmpegcolorspace_chain): wrap NULL in GST_ELEMENT_ERROR call
* gst/videofilter/make_filter: make use of tr portable
* pkgconfig/Makefile.am: Remove GNU extension in Makefile target