Restrict works very poorly in Visual Studio (much slower than without)
so defined flac_restrict in share/compat.h and use that in:

    lpc_compute_residual...()
    lpc_restore_signal...()

As a result, FLAC__lpc_compute_residual_from_qlp_coefficients_wide_intrin_sse41()
offers no advantage for 64-bit compiles and was removed from x86-64 part
of stream_encoder.c

Patch-from: lvqcl <lvqcl.mail@gmail.com>