* configure.ac (GSTREAMERMM_MODULES): Require the
	gstreamer-pbutils-0.10 package so that GSTREAMERMM_LIBS variable
	includes the -lgstpbutils-0.10 automatically.
	* examples/Makefile.am (LDDADD): Remove the extra (now unneeded)
	-lgstpbutils-0.10.
	* gstreamer/gstreamermm.pc.in (Libs): Remove it from here also because
	it is included automatically from the "Requires:" section.