* qatar/master:
  dsputil: Make dsputil selectable

Conflicts:
	configure
	libavcodec/Makefile
	libavcodec/x86/Makefile
	libavcodec/x86/constants.c
	libavcodec/x86/dsputil_mmx.c
	libavcodec/x86/dsputil_mmx.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>