RefreshLinks on imagelinks on new uploads to kill tracking cat.

When someone uploads a new file, we should refresh all the pages
that use that image, so that [[Category:Pages with broken file links]]
gets removed.

Future fixme would to run this again on file deletes, but that's
less critical as they will eventually get added on next reparse
and people don't expect that to happen instantly like when fixing
the issue. Ditto for someone creating a new file redirect.

Bug: 46749
Change-Id: I7889598eee54a1c07c64f750b8499e922ba59704
Merge "RefreshLinks on imagelinks on new uploads to kill tracking cat."