[compiler-rt] compiler-rt: sanitizer_common: use close_range() instead of looping (PR #114442)

[Paweł Bylica via llvm-commits]

chfast wrote:

The `close_range` was added in FreeBSD 12.2. This is not a concern for building LLVM? I'm adding support for Linux in https://github.com/llvm/llvm-project/pull/191450.

https://github.com/llvm/llvm-project/pull/114442