[clang] [-Wunterminated-string-initialization] Handle C string literals ending with explicit '\0' (PR #143487)

[Ziqing Luo via cfe-commits]

ziqingluo-90 wrote:

> LLVM Buildbot has detected a new failure on builder `llvm-x86_64-debian-dylib` running on `gribozavr4` while building `clang` at step 7 "test-build-unified-tree-check-llvm".
> 
> Full details are available at: https://lab.llvm.org/buildbot/#/builders/60/builds/31310
> 
> Here is the relevant piece of the build log for the reference

I don't think the failure is relevant.

https://github.com/llvm/llvm-project/pull/143487