outelf: claim %pragma elf as our namespace
outelf: claim %pragma elf as our namespace

We don't have any elf pragmas yet, but we want to be able to do
"%pragma elf" and have it work for any of the elf formats.

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

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