[include-cleaner] Fix -Woverloaded-virtual warning, NFC.

Author: hokein

clang-tools-extra/include-cleaner/lib/Record.cpp

@@ -99,14 +99,15 @@ class PPRecorder : public PPCallbacks {
       recordMacroRef(MacroNameTok, *MI, RefType::Ambiguous);
   }
 
+  using PPCallbacks::Elifdef;
+  using PPCallbacks::Elifndef;
   void Elifdef(SourceLocation Loc, const Token &MacroNameTok,
                const MacroDefinition &MD) override {
     if (!Active)
       return;
     if (const auto *MI = MD.getMacroInfo())
       recordMacroRef(MacroNameTok, *MI, RefType::Ambiguous);
   }
-
   void Elifndef(SourceLocation Loc, const Token &MacroNameTok,
                 const MacroDefinition &MD) override {
     if (!Active)