[llvm] Modify dwarfdump verification to allow sub-category counts (PR #125062)

[Nico Weber via llvm-commits]

nico wrote:

Looks like the new test isn't passing, see the many reports above. (Here's another: http://45.33.8.238/linux/159907/step_11.txt).

I've reverted it for now. Please reland once tests pass :)

https://github.com/llvm/llvm-project/pull/125062