[clang] [compiler-rt] [ubsan] Display correct runtime messages for negative _BitInt (PR #96240)

[Rainer Orth via cfe-commits]

rorth wrote:

The patch also broke the [Solaris/sparcv9 buildbot](https://lab.llvm.org/buildbot/#/builders/13/builds/1579).

https://github.com/llvm/llvm-project/pull/96240