Ensure that git commit is set in docker build

Signed-off-by: Evan Lezar <elezar@nvidia.com>

docker/docker.mk

@@ -131,6 +131,7 @@ docker-build-%:
 	    --build-arg PKG_VERS="$(LIB_VERSION)" \
 	    --build-arg PKG_REV="$(PKG_REV)" \
 	    --build-arg CONFIG_TOML_SUFFIX="$(CONFIG_TOML_SUFFIX)" \
+		--build-arg GIT_COMMIT="$(GIT_COMMIT)" \
 	    --tag $(BUILDIMAGE) \
 	    --file $(DOCKERFILE) .
 	$(DOCKER) run \