[clang] [llvm] [UBSan] make ubsantrap `inaccessiblemem: write` (PR #156100)

[Nikita Popov via cfe-commits]

https://github.com/nikic approved this pull request.

LGTM, assuming the intended usage model for these does not include introspection of memory at the time of trap.

https://github.com/llvm/llvm-project/pull/156100