Squashed 'externals/xbyak/' changes from d512551e..2794cde7
2794cde7 add xword, yword, etc. in Xbyak::util
fb9c04e4 fix document for vfpclassps
a51be78b fix test dependency
04fdfb1e update version
e6354f8b add vgf2p8mulb
09a12642 add gf2p8affineqb
d171ba0e add gf2p8affineinvqb
457f4fd0 add vpshufbitqmb
5af0ba39 add vpexpand{b,w}
e450f965 vpopcnt{d,q} supports ptr_b
48499eb1 add vpdpbusd(s), vpdpwssd(s)
9c745109 add vpdpbusd, vpdpbusds
0e1a11b4 add vpopcnt{b,w,d,q}
9acfc132 add vpshrd(v){w,d,q}
ac8de850 add vpshld(v){w,d,q}
f181c259 add vcompressb, vcompressw
5a402477 vpclmulqdq supports AVX-512
9e16b40b vaes* supports AVX-512
7fde08e0 add flags for intel's manual 319433-030.pdf
c5da3778 add test of v4fmaddps, vp4dpwssd, etc.
e4fc9d8a fix mpx encoding
d0b2fb62 add bnd(0xf2) prefix for MPX
f12b5678 use db for array
cd74ab44 remove bat file
git-subtree-dir: externals/xbyak
git-subtree-split: 2794cde79eb71e86490061cac9622ad0067b8d15
9fb82036ca