Update file permissions for FlutterMacOS.framework (#52930)
During FlutterMacOS.framework engine universal fat framework creation, make sure the framework is `u=rwx,go=rx` when it's created.
There's a framework-side workaround in-flight https://github.com/flutter/flutter/pull/148580.
However, this is still a good thing to do engine-side, particularly for add-to-app when they don't go through the `flutter assemble` tooling.
I'll also add a test around here, once this rolls https://github.com/flutter/flutter/blob/02a6c91e4d37d28f42c8f8e4d4335b0defed41c1/packages/flutter_tools/test/host_cross_arch.shard/macos_content_validation_test.dart#L30
Fixes https://github.com/flutter/flutter/issues/148354
[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style
diff --git a/sky/tools/create_macos_framework.py b/sky/tools/create_macos_framework.py
index 51020cd..72da54f 100755
--- a/sky/tools/create_macos_framework.py
+++ b/sky/tools/create_macos_framework.py
@@ -86,6 +86,8 @@
subprocess.check_call([
'lipo', arm64_dylib, x64_dylib, '-create', '-output', fat_framework_binary
])
+ # Make the framework readable and executable: u=rwx,go=rx.
+ subprocess.check_call(['chmod', '755', fat_framework_binary])
# Add group and other readability to all files.
versions_path = os.path.join(fat_framework, 'Versions')
