[compiler-rt] [compiler-rt] [code-quality] replaced insecure function calls in _initializeAvailabilityCheck (PR #98659)

[Volodymyr Sapsai via llvm-commits]

vsapsai wrote:

@dtellenbach I believe you were doing some compiler-rt work recently. Can you please help assessing the implications for backdeployment?

https://github.com/llvm/llvm-project/pull/98659