[flang] [llvm] [flang][MIF] Adding Stop and ErrorStop operations (PR #166787)

[Jean-Didier PAILLEUX via llvm-commits]

JDPailleux wrote:

> Two small nits, looks good otherwise.

Thanks for all your feedback really ! (and sorry for my lack of attention)

https://github.com/llvm/llvm-project/pull/166787