[clang] [clang] Fix crash in dynamic_cast final class optimization (PR #152076)

[Erich Keane via cfe-commits]

erichkeane wrote:

> > > LLVM Buildbot has detected a new failure on builder `lldb-aarch64-ubuntu` running on `linaro-lldb-aarch64-ubuntu` while building `clang` at step 6 "test".
> > > Full details are available at: https://lab.llvm.org/buildbot/#/builders/59/builds/22214
> > > Here is the relevant piece of the build log for the reference
> > 
> > 
> > Sigh, let's see what configuration I broke
> 
> lldb-api seems unlikely to be due to this pr?

Yeah, I'd guess that one is flakey in some way.  I don't see how it coudl be caused by this.  Perhaps see what happens with the 'next' build there ( https://lab.llvm.org/buildbot/#/builders/59/builds/22215)

https://github.com/llvm/llvm-project/pull/152076