outmac: default to bits 32 for macho32 output format
outmac: default to bits 32 for macho32 output format

Default to 32 bits for macho32; default to 64 bits for macho64.

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

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