preproc: reverse the order of the tokens in %deftok
preproc: reverse the order of the tokens in %deftok

Smacros are apparently stored with the token stream reversed, so make
sure %deftok matches that sense of relatity.

Signed-off-by: H. Peter Anvin <8a453bad9912ffe59bc0f0b8abe03df9be19379e@zytor.com>

turingstudio/nasm,Distrotech/nasm,techkey/nasm,letolabs/nasm,projedi/nasm,letolabs/nasm,projedi/nasm,techkey/nasm,turingstudio/nasm,projedi/nasm,Distrotech/nasm,letolabs/nasm,Distrotech/nasm,techkey/nasm,techkey/nasm,projedi/nasm,techkey/nasm,projedi/nasm,turingstudio/nasm,Distrotech/nasm,turingstudio/nasm