libFLAC : SSE optimisations.
Add new function: FLAC__lpc_compute_residual_from_qlp_coefficients_intrin_sse41() and rewrite function: FLAC__lpc_compute_residual_from_qlp_coefficients_16_intrin_sse2() Testing shows noticeable speed increase on Intel Core i3/5/7 (up to 30% for -8 mode), AMD Athlon64, Phenom, Bulldozer/Piledriver, but no increase or even very small speed decrease (~2% for -8 mode) on Intel Core2. Patch-from: lvqcl <lvqcl.mail@gmail.com>
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