[compiler-rt] Fixed small memory leak in libprofile (PR #141739)

[via llvm-commits]

gbMattN wrote:

>From the buildbot it looks like my commit may be the one that broke this, but the break is in the file `llvm-project/libc/src/stdlib/memalignment.cpp`, the error being 
```
error: unknown type name 'uintptr_t'
   20 |   uintptr_t addr = reinterpret_cast<uintptr_t>(p);
```

I think this commit is fine then, since it doesn't touch that file, nor mess with any type definitions

https://github.com/llvm/llvm-project/pull/141739