[flang] [llvm] [Premerge] Add flang-rt (PR #128678)

[Michael Kruse via llvm-commits]

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@@ -65,6 +73,11 @@ function compute-runtimes-to-test() {
         echo $p
       done
     ;;
+    flang)
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Meinersbur wrote:

Not the case. `compute-runtimes-to-test` receives the aguments to "LLVM_ENABLE_PROJECTS" and prints the arguments to "LLVM_ENABLE_RUNTIMES". There is no function for the reverse direction.

If you one day rewrite the mechanism, consider giving different names to "top-level directory in the repository", "valid argument to LLVM_ENABLE_PROJECTS", and "valid argument to LLVM_ENABLE_RUNTIMES". They are currently all called "projects" in some form.

https://github.com/llvm/llvm-project/pull/128678