[libcxx-commits] [libcxx] [libc++] Fix bogus integer sanitizer warnings in hash helpers (PR #146715)

[Jean-Michaël Celerier via libcxx-commits]

jcelerier wrote:

string repro:

```
#include <string>
#include <functional>

int main() { std::hash<std::string>{}( "EnableActionIfDocument"); }
```

https://github.com/llvm/llvm-project/pull/146715