[RFA] Fix PR 16201: internal error on a cygwin program linked against a DLL with no .data section

[Joel Brobecker]

> But could you elaborate onto why you are unsure about the patch?
> What is bothering you?

Sure. I may have expressed myself poorly. The patch wasn't obvious,
and I didn't have time to look into it more closely. So if I were
the one reviewing it, I'd need a small chunk of free time to really
understand it well, and double-check its possible unwanted side-effects.
Maybe someone else, who is more familiar with objfiles et al, might
find it easier to review.

-- 
Joel