[Driver] Mark a few more flags as DoesNotAffectIncrementalBuild.

[jrose-apple]

...so that adding or removing them doesn't force a rebuild.

[jrose-apple]

@modocache, can you sanity-check this?

@swift-ci Please smoke test

[modocache]

LGTM, but after a cursory search I wasn't 100% sure if -save-temps truly has no effect on incremental compilation.

[jrose-apple]

Yeah, that was the one that prompted this. I looked through all the existing uses, and I think we're good:

• input and output file lists, always newly-generated
• intermediate outputs not in an output file map, also always newly-generated
• auxiliary outputs next to a primary output, if the primary output is a temporary file

Stepping back, if there is a problem with changing between -save-temps and not, there's probably a problem with successive -save-temps runs at well. So I think I've managed to convince myself this is safe.

(And -save-temps is really a debugging option anyway. An output file map is still the right way to keep intermediates around that aren't just infrastructure.)

[jrose-apple]

I've re-read my own logic and reconvinced myself. Re-running tests just in case.

@swift-ci Please smoke test

[modocache]