configure: Set default HOSTCFLAGS/HOSTCPPFLAGS after compiler detection

This prevents the default HOSTCFLAGS from getting clobbered by flags
passed to configure on the command line.
h264: skip chroma edges at the picture boundary while deblocking 4:4:4

This handles macroblock edges for the chroma components in the same way
as for the luma compoment for 4:4:4 streams. The Spec explicitly states
that the deblocking filter is not applied to edges at the boundary of
the picture.

Signed-off-by: Janne Grunau <janne-libav@jannau.net>
bfin: vp3: Mark all binary object sections appropriately

This fixes a leftover from e44d7c659ba56d7efd6de10d5d99a1c44fd997fa.
Merge commit '8267f9363532b23b3b8b4e27491ee2d412a8aec3'

* commit '8267f9363532b23b3b8b4e27491ee2d412a8aec3':
  configure: Set default HOSTCFLAGS/HOSTCPPFLAGS after compiler detection

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'ea49f60523c4f4c43cb06a35166b44478d473e51'

* commit 'ea49f60523c4f4c43cb06a35166b44478d473e51':
  h264: skip chroma edges at the picture boundary while deblocking 4:4:4

Conflicts:
	libavcodec/h264.c

See: f27b22b4974c740f4c7b4140a793cac196179266
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  bfin: vp3: Mark all binary object sections appropriately

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/x86/lossless_videodsp: add diff_int16_mmx/sse2

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/x86/lossless_videodsp: port add_hfyu_median_prediction_mmxext to 16bit

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/x86/lossless_videodsp: Port sub_hfyu_median_prediction_mmxext to int16

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/x86/lossless_videodsp: port sub_hfyu_median_prediction_int16 to yasm

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