Commit to the build envs in the manifest file (#78)

Dockerfile

@@ -6,6 +6,8 @@ ARG LOG_PUBLIC_KEY
 ARG OS_PUBLIC_KEY1
 ARG OS_PUBLIC_KEY2
 ARG GIT_SEMVER_TAG
+# Build environment variables. In addition to routing these through to the make
+# command, they MUST also be committed to in the manifest.
 ARG BEE
 ARG CONSOLE
 

release/cloudbuild_ci.yaml

@@ -67,6 +67,8 @@ steps:
           --firmware_file=output/armored-witness-boot.imx \
           --firmware_type=BOOTLOADER \
           --tamago_version=${_TAMAGO_VERSION} \
+          --build_env="BEE=${_BEE}" \
+          --build_env="CONSOLE=${_CONSOLE}" \
           --raw \
           --output_file=output/boot_manifest_unsigned.json
   # Sign the log entry.