How do I backport two jdk->jdk17u-dev commits together?

[Andrew Leonard]

I have 2 jdk commits I want to backport to jdk17u-dev that are dependent on
each other, one fixes an issue in the first one.
How do I achieve that with the Skara commands?
The 2nd one will not backport cleanly without the first as it modifies code
from the 1st, so they sort of need doing together?
Or do I just do the 1st, then do the 2nd separately.

thanks
Andrew