vex x86->IR: unhandled instruction CRC (SSE4.2)

vex x86->IR: unhandled instruction CRC (SSE4.2)

vex x86->IR: unhandled instruction bytes: 0xF2 0xF 0x38 0xF1
(CRC, SSE4.2)

VEX/priv/guest_x86_helpers.c:  Helper functions for
	crc32 computation
VEX/pub/libvex_guest_x86.h:  Helper function decls
VEX/priv/guest_x86_toIR.c:  The crc32 instruction decoder
none/tests/x86/crc32.c:  New testcase
none/tests/x86/crc32.stdout.exp:  Ditto (expected output)
none/tests/x86/crc32.vgtest:  Ditto (testcase config)
none/tests/x86/Makefile.am:  Plug the test in

https://bugs.kde.org/show_bug.cgi?id=438640