Add patch for ed/idl/SVG.idl

[tidoust]

Second try (see #1487)

[dontcallmedom]

thinking some more: we probably need an issue on this repo to reference in the patch, otherwise the patch will be deleted if the other SVG issue gets closed (one can always dream)

[tidoust]

thinking some more: we probably need an issue on this repo to reference in the patch, otherwise the patch will be deleted if the other SVG issue gets closed (one can always dream)

Probably, but I'm going to lazily ignore the comment. Even if the other SVG issue gets fixed:

1. Curation is going to fail immediately, most likely before the clean up job runs. We'll know that the patch needs an update.
2. The clean up job won't delete the file in any case, it will just create a PR to delete it, and the PR won't pass IDL tests.