[webkit-dev] New in-rietveld patch flag

[Eric Seidel]

As part of https://bugs.webkit.org/show_bug.cgi?id=38866 I've added a
new flag to bugzilla patches called "in-rietveld".

This flag may be changed or removed in the coming weeks.  If you have
questions/comments/concerns please bring them up with Ojan or Julie on
the bug.

Thanks to both of them for doing the leg-work to try and improve our
reviewing experience!

-eric