util/docker: add nasm to fix tianocore payload compilation

This patch address problem with Tianocore compilation in coreboot-sdk
container. Without it compilation fails asking for nasm installation.

Change-Id: I546f9d42b380799d1cd80a70f33be2a768745080
Signed-off-by: Piotr Król <piotr.krol@3mdeb.com>
Reviewed-on: https://review.coreboot.org/21924
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Martin Roth <martinroth@google.com>

util/docker/coreboot-sdk/Dockerfile

@@ -51,6 +51,7 @@ RUN \
 		libyaml-dev \
 		m4 \
 		make \
+		nasm \
 		openssl \
 		p7zip-full \
 		patch \