[llvm-branch-commits] [llvm] [BOLT] Improve file handling in NFC-Mode (PR #146513)

[Paschalis Mpeis via llvm-branch-commits]

paschalis-mpeis wrote:

Deals cases like this:
- https://lab.llvm.org/buildbot/#/builders/92/builds/21644

The previous revision had build failures which caused an exception during renaming.
This caused the NFC-Mode to stay in the old revision.

https://github.com/llvm/llvm-project/pull/146513