[llvm][Bazel] Adapt to 4eb30cf

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Differential Revision: https://phabricator.intern.facebook.com/D60251738

Author: akuegel

utils/bazel/llvm-project-overlay/llvm/BUILD.bazel

@@ -944,7 +944,10 @@ cc_library(
     srcs = glob([
         "lib/IR/*.cpp",
         "lib/IR/*.h",
-    ]),
+    ]) + [
+        # To avoid a dependency cycle.
+        "include/llvm/Analysis/IVDescriptors.h",
+    ],
     hdrs = glob(
         [
             "include/llvm/*.h",