[llvm] [flang][CMake] Add missing dependency to generate Fortran module files (PR #91517)

[Kiran Chandramohan via llvm-commits]

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@@ -432,7 +432,7 @@ if(runtimes)
       # TODO: This is a workaround until flang becomes a first-class project
       # in llvm/CMakeList.txt.  Until then, this line ensures that flang-new is
       # built before "openmp" is built as a runtime project.
-      list(APPEND extra_deps "flang-new")
+      list(APPEND extra_deps "flang-new" "module_files")
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kiranchandramohan wrote:

Could you add a comment on why the `module_files` is required here?

https://github.com/llvm/llvm-project/pull/91517