[flac-dev] PATCH: CPU feature detection when NASM n/a

[lvqcl]

There was a commit "Fall back to intrinsics if NASM is not available"
( http://git.xiph.org/?p=flac.git;a=commit;h=d163ef456797ef4807138b0ecb5da9ff05e147e2 )

But CPU detection code for IA-32 uses ASM code, and cpuinfo.use_asm == false
when NASM isn't available. The attached patch fixes it. Now CPU features are
also detected when only FLAC__HAS_X86INTRIN is defined.
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