[llvm] [BOLT] Discard BB profiles with a hash of 0 in yaml from a Post-BAT binary (PR #169627)

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You can test this locally with the following command:
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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- bolt/lib/Profile/DataAggregator.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/bolt/lib/Profile/DataAggregator.cpp b/bolt/lib/Profile/DataAggregator.cpp
index dcda502a6..73baceae7 100644
--- a/bolt/lib/Profile/DataAggregator.cpp
+++ b/bolt/lib/Profile/DataAggregator.cpp
@@ -2417,7 +2417,8 @@ std::error_code DataAggregator::writeBATYAML(BinaryContext &BC,
       // Skip printing if there's no profile data
       llvm::erase_if(
           YamlBF.Blocks, [](const yaml::bolt::BinaryBasicBlockProfile &YamlBB) {
-            if ((size_t)YamlBB.Hash == 0) return true;
+            if ((size_t)YamlBB.Hash == 0)
+              return true;
             auto HasCount = [](const auto &SI) { return SI.Count; };
             bool HasAnyCount = YamlBB.ExecCount ||
                                llvm::any_of(YamlBB.Successors, HasCount) ||

``````````

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https://github.com/llvm/llvm-project/pull/169627