Fix additional_content -> content

scripts/build.py

@@ -69,7 +69,7 @@ def build_package(repo_dir, package_dir, name,
         if additional_content is not None:
             os.chdir(workdir)
             for content in additional_content:
-                os.chdir(additional_content["target_dir"])
+                os.chdir(content["target_dir"])
                 if "patch_dir" in content:
                     abs_patch_dir = os.path.join(
                         repo_dir, content["patch_dir"])