[compiler-rt] [sanitizer_common] [Darwin] Adopt _dyld_get_dyld_header (PR #182943)

[Andrew Haberlandt via llvm-commits]

ndrewh wrote:

I think we should cherry-pick this to make sure that clang 22 supports ASAN on macOS 26.4.

https://github.com/llvm/llvm-project/pull/182943