`make list_toolchain_updates-firefox-macos` could check if the macos entitilments files we use for signing have changed

The entitlements files we use for signing Tor and Mullvad browsers are stored in tor-browser-build.git/tools/signing/macos-entitlements, and have been copied from tor-browser.git/security/mac/hardenedruntime/production.

The list of files being signed by each entitlements files is stored in tor-browser.git/taskcluster/config.yml, in mac-signing. While we do that in tor-browser-build.git/tools/signing/wrappers/sign-rcodesign-128.

The make list_toolchain_updates-firefox-macos command could check if the entitlements files and the list of files being signed by each one has been changed upstream.