Improve naming of macros in lexer.
Improve naming of macros in lexer.

evanlabs/mujs,ccxvii/mujs,ccxvii/mujs,BOGY/mujs,lsm/mujs,guiquanz/mujs,thurday/mujs,ccxvii/mujs,ccxvii/mujs,earthling42/mujs,Frky/mujs