liblzma: x86 CLMUL CRC: Rewrite

It's faster with both tiny and large buffers and doesn't require
disabling any sanitizers. With large buffers the extra speed is
from folding four 16-byte chunks in parallel.

It is unknown if the MSVC workaround on 32-bit x86 is still needed.
I omitted it from this commit.

Thanks to Sam James for the feedback.

Fixes: #112
Fixes: #122