[llvm] [CI] Enable OpenMP and Offload runtime in premerge (PR #174955)

[Jan Patrick Lehr via llvm-commits]

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@@ -443,7 +444,8 @@ def test_lit(self):
             "check-bolt check-clang check-clang-tools check-cross-project check-flang check-lit check-lld check-lldb check-llvm check-mlir check-polly",
         )
         self.assertEqual(
-            env_variables["runtimes_to_build"], "libcxx;libcxxabi;libunwind"
+            env_variables["runtimes_to_build"],
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jplehr wrote:

Without this change, darker complains.

https://github.com/llvm/llvm-project/pull/174955