[compiler-rt] [compiler-rt][rtsan] ptrace interception on Linux. (PR #123941)

[Chris Apple via llvm-commits]

cjappl wrote:

I think this is another one like the scheduling ones - this call is used to debug, do we intercept it or assume that someone using it knows what they are doing? An alternative read could be "People should be notified if they accidentally leave ptrace in, and they will not be using it alongside rtsan".

@davidtrevelyan do you think we should intercept this call? I'm on the fence

https://github.com/llvm/llvm-project/pull/123941