[llvm] [PDB] Fix missing `consumeError` which raise error with asserts enabled (PR #116480)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

This looks reasonable to me, but I'm not familiar with the code. Is this something that we can reasonably test or not?

https://github.com/llvm/llvm-project/pull/116480