nasm: scan the command line twice
nasm: scan the command line twice

Scan the command line twice, so we among other things can set up the
proper preprocessor before calling any of the preprocessor entry
points.

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

techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm