Clang: Update or insert used defines in the storage by the symbol indexer

Change-Id: Id8af85976be391e17886c9947863b81d206bb575
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/tools/clangrefactoringbackend/source/symbolindexer.cpp

@@ -68,6 +68,8 @@ void SymbolIndexer::updateProjectPart(V2::ProjectPartContainer &&projectPart,
     m_symbolStorage.updateProjectPartSources(projectPart.projectPartId(),
                                              m_symbolsCollector.sourceFiles());
 
+        m_symbolStorage.insertOrUpdateUsedDefines(m_symbolsCollector.usedDefines());
+
     transaction.commit();
 
 }