changes.src: document Mach-O alignment fix.
changes.src: document Mach-O alignment fix.

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