[llvm] [flang][runtime] Refine state associated with child I/O (PR #150461)

[via llvm-commits]

ronlieb wrote:

i think its a mismatch of using an openmpi build that is slightly out of date with respect to latest flang sources. Just now I rebuilt openmpi using todays local build of llvm/main .  test passes and valgrind errors no longer present.    

i think we can close this out  as stale build.

https://github.com/llvm/llvm-project/pull/150461