util/docker: Add libnss3-dev package to coreboot-sdk for vboot

The latest updates to Vboot use libnss, so add the library to the
coreboot sdk.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: Iee0c44296b189b5327ef8f950b1bba9eb668f298
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78867
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
diff --git a/util/docker/coreboot-sdk/Dockerfile b/util/docker/coreboot-sdk/Dockerfile
index be60545..daced1b 100644
--- a/util/docker/coreboot-sdk/Dockerfile
+++ b/util/docker/coreboot-sdk/Dockerfile
@@ -51,6 +51,7 @@
 		libgpiod-dev \
 		libjaylink-dev \
 		liblzma-dev \
+		libnss3-dev \
 		libncurses-dev \
 		libpci-dev \
 		libreadline-dev \