misc/release: do xz compression with -9e
misc/release: do xz compression with -9e

Use the -9e compression level when doing xz compression.  It only
saves a few kilobytes, but since our files are pretty small it doesn't
really take all that much time.

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

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