Graal day-to-day process

[Andrew Haley]

I now have my grand AArch64 pull request out for review.

So, on to the next thing.  Whatever I do will depend on the big
AArch64 patch because Graal crashes without it.  But I don't want
to add anything to that branch, and I'm waiting for the big patch
to be pulled then I'll base my new work on that.

So what do people do in this situation?  Work in a local repo
based on a branch, create a new branch based on the big patch,
or what?

Thanks,

Andrew.