kernel: Integrate initramfs into Guest kernel

Integrate initramfs into guest kernel as one binary,
which will be measured by the firmware together.

Fixes: #6674

Signed-off-by: Wang, Arron <arron.wang@intel.com>

tools/packaging/static-build/kernel/build.sh

@@ -25,6 +25,7 @@ sudo docker pull ${container_image} || \
 
 sudo docker run --rm -i -v "${repo_root_dir}:${repo_root_dir}" \
 	-w "${PWD}" \
+	--env MEASURED_ROOTFS="${MEASURED_ROOTFS:-}" \
 	"${container_image}" \
 	bash -c "${kernel_builder} $* setup"