[libunwind] [libunwind] fix pc range condition check bug (PR #154902)

[Wu Yingcong via cfe-commits]

yingcong-wu wrote:

Hi @fmayer , do you think this PR is ready to merge based on the CI results? I don't think the failed checks are related to my change. In my opinion, it looks more like infrastructure issues.
I see the following message in the log, not sure if that is the root cause.
```
+ /opt/freeware/bin/ninja -vC /scratch/powerllvm/cpap8007/llvm-project/libcxx-ci/build/aix check-cxx-abilist
ninja: Entering directory `/scratch/powerllvm/cpap8007/llvm-project/libcxx-ci/build/aix'
ninja: error: unknown target 'check-cxx-abilist'
+ error 'Generating the libc++ ABI list after failed check'
+ echo '::error::Generating the libc++ ABI list after failed check'
::error::Generating the libc++ ABI list after failed check
```

https://github.com/llvm/llvm-project/pull/154902