fix(make_release): create the build directory as non-root

Unless we call `ensure_build_dir`, the build directory will be created
inside the Docker container as root and subsequent builds will fail. Fix
this by making sure exists before building with proper permissions.

(cherry picked from commit 63749ec)

Signed-off-by: Babis Chalios <bchalios@amazon.es>

tools/devtool

@@ -496,6 +496,7 @@ cmd_build() {
 }
 
 function cmd_make_release {
+ ensure_build_dir
  run_devctr \
  --user "$(id -u):$(id -g)" \
  --workdir "$CTR_FC_ROOT_DIR" \