Starting patch review wiki

[Kyrylo Tkachov]

Hi all,

I gave a talk at last Cauldron in Porto about starting upstream patch review and addressing some common issues that potential new reviewers face. I was asked to put the content together on a wiki page. Apologies for the delay, but I’ve done that now at:
https://gcc.gnu.org/wiki/StartingPatchReview
It should be visible from the wiki home page too.
Feel free to extend it with more review guidance or correct things that you think are wrong.

Thanks,
Kyrill