message: ci: Add BUILD_TYPE to toolchain.info
diff: @@ -32,6 +32,7 @@ commands:
  # Create the toolchain.info file for cache key.
  echo $TOOLCHAIN >> toolchain.info
  + echo $BUILD_TYPE >> toolchain.info
  $CXX --version >> toolchain.info
  - restore_cache:
  name: "Restore Hunter cache"
  