[BOLT] Fix warnings

This patch fixes:

  bolt/lib/Profile/StaleProfileMatching.cpp:694:24: error: unused
  variable 'BinHash' [-Werror,-Wunused-variable]

  bolt/lib/Profile/YAMLProfileWriter.cpp:206:61: error: missing field
  'GUID' initializer [-Werror,-Wmissing-field-initializers]

  bolt/lib/Profile/YAMLProfileReader.cpp:840:16: error: unused
  variable 'MatchedWithPseudoProbes' [-Werror,-Wunused-variable]

Author: kazutakahirata

bolt/lib/Profile/StaleProfileMatching.cpp

@@ -697,6 +697,7 @@ size_t matchWeights(
                         << " to BB (index = " << MatchedBlock->Index - 1 << ")"
                         << " with hash " << Twine::utohexstr(BinHash.combine())
                         << "\n");
+      (void)BinHash;
       uint64_t ExecCount = YamlBB->ExecCount;
       // Update matching stats accounting for the matched block.
       switch (Method) {

bolt/lib/Profile/YAMLProfileReader.cpp

@@ -837,7 +837,8 @@ Error YAMLProfileReader::readProfile(BinaryContext &BC) {
   const size_t MatchedWithLTOCommonName = matchWithLTOCommonName();
   const size_t MatchedWithCallGraph = matchWithCallGraph(BC);
   const size_t MatchedWithNameSimilarity = matchWithNameSimilarity(BC);
-  const size_t MatchedWithPseudoProbes = matchWithPseudoProbes(BC);
+  [[maybe_unused]] const size_t MatchedWithPseudoProbes =
+      matchWithPseudoProbes(BC);
 
   for (auto [YamlBF, BF] : llvm::zip_equal(YamlBP.Functions, ProfileBFs))
     if (!YamlBF.Used && BF && !ProfiledFunctions.count(BF))

bolt/lib/Profile/YAMLProfileWriter.cpp

@@ -203,7 +203,7 @@ YAMLProfileWriter::convertBFInlineTree(const MCPseudoProbeDecoder &Decoder,
     else
       PrevGUIDIdx = GUIDIdx;
     YamlInlineTree.emplace_back(yaml::bolt::InlineTreeNode{
-        Node.ParentId - PrevParent, Node.InlineSite, GUIDIdx});
+        Node.ParentId - PrevParent, Node.InlineSite, GUIDIdx, 0, 0});
     PrevParent = Node.ParentId;
   }
   return {YamlInlineTree, InlineTreeNodeId};