x86cpuid.pl: fix extended feature flags detection.
ghash-x86_64.pl: add Haswell performance data.
sha[256|512]-586.pl: add more SIMD code paths.
sha512-x86_64.pl: upcoming-Atom-specific optimization.
sha1-x86_64.pl: add AVX2+BMI code path.
aesni-sha256-x86_64.pl: harmonize with latest sha512-x86_64.pl.
aesni-sha1-x86_64.pl: update performance data.