[flac-dev] PATCH: add FLAC__SSE_SUPPORTED and FLAC__SSE2_SUPPORTED

[lvqcl]

Currently the only way to compile FLAC using GCC w/o SSE support
is to disable asm optimizations (see configure.ac):

	if test "x$asm_optimisation" = "xyes" ; then
		XIPH_ADD_CFLAGS([-msse2])
		fi


Also it's not possible to enable SSE4.1 intrinsic functions even
with -msse4.1 option. The patch fixes both problems.


---------------
BTW: I'm not sure that share/compat.h is the best place to define these
FLAC__SSEN_SUPPORTED macros. Maybe it's better to move them to some libFLAC .h file?
E.g. to src/libFLAC/include/private/cpu.h?
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