libjpeg-turbo: Use --reproducible option for nasm

This ensures that nasm version and timestamps do but appear in build
outputs

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>