Merge remote-tracking branch 'qatar/master'

* qatar/master:
  vc1: export some functions
  configure: use HOSTCC_C/O in check_host_cc
  configure: use AS_O setting in check_as
  configure: use LD_O setting in check_ld()
  Revert "dsputil: make {add/put/put_signed}_pixels_clamped() non-static."
  build: Restore dependency of acelp_filters.o on celp_math.o
  celp_math: Replace duplicate ff_dot_productf() by ff_scalarproduct_c()
  celp_math: Move ff_cos() to the only place it is used
  build: Use portable abstraction for linker/hostcc output file syntax
  configure: Fix shared library creation for OpenBSD
  vp56: Don't use DECLARE_ALIGN on a typedef name
  mss1: move code that will be reused by MSS2 decoder into separate file
  mss1: merge decode_intra() and decode_inter()
  avprobe: Get rid of ugly casts in the options table
  vf_hqdn3d: Remove a duplicate inline declaration

Conflicts:
	Makefile
	configure
	ffprobe.c
	libavcodec/Makefile
	libavcodec/amrnbdec.c
	libavcodec/amrwbdec.c
	libavcodec/celp_math.c
	libavcodec/celp_math.h
	libavcodec/dsputil.c
	libavcodec/lsp.c
	libavcodec/mss1.c
	libavcodec/ra288.c
	libavcodec/vc1dec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

Makefile

@@ -57,7 +57,7 @@ $(PROGS): %$(EXESUF): %_g$(EXESUF)
 	$(STRIP) $@
 
 $(TOOLS): %$(EXESUF): %.o
-	$(LD) $(LDFLAGS) -o $@ $< $(ELIBS)
+	$(LD) $(LDFLAGS) $(LD_O) $< $(ELIBS)
 
 tools/cws2fws$(EXESUF): ELIBS = -lz
 
@@ -102,7 +102,7 @@ endef
 $(foreach P,$(PROGS-yes),$(eval $(call DOPROG,$(P))))
 
 %$(PROGSSUF)_g$(EXESUF): %.o cmdutils.o $(FF_DEP_LIBS)
-	$(LD) $(LDFLAGS) -o $@ $(OBJS-$*) cmdutils.o $(FF_EXTRALIBS)
+	$(LD) $(LDFLAGS) $(LD_O) $(OBJS-$*) cmdutils.o $(FF_EXTRALIBS)
 
 OBJDIRS += tools