[compiler-rt] [rtsan] Add pipe, mkfifo interceptors (PR #116915)

[Chris Apple via llvm-commits]

cjappl wrote:

For anyone discovering this when their darwin builds behaved badly

I am going to revert mkfifoat in just a second, I thought it was introduced in 10.13, but instead it was introduced in 13. I expect this to cause build failures, so I'm reverting it. Will post here when it is done with a link 

https://github.com/llvm/llvm-project/pull/116915