I've seen a bunch of different patches that add this file as a new file.  Is it safe to add? That is: can you add it to the style directory without it getting copied into the build dir and the application.zip file?  If so, then maybe just create a PR and add it independently of all the other patches that seem to have incorporated it.

Or, if this is the byproduct of something in the build process, then maybe it could be placed in a .gitignore file so it doesn't get added.