finalize lexer definition
Squashed 'xbyak/' content from commit 72cdfb8

git-subtree-dir: xbyak
git-subtree-split: 72cdfb80be64eabc3d0ec3992c8b55cb28032641
Merge commit 'e17b0a3f10d4ab0200df7f57cd7674d54f1c6779' as 'xbyak'