CompilationDatabase: Create target in the same thread

Causes a warning otherwise.

Change-Id: I040c3298e7c0898364b49ff4c6605f11f01c538f
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/compilationdatabaseprojectmanager/compilationdatabaseproject.cpp

@@ -302,8 +302,6 @@ void CompilationDatabaseProject::buildTreeAndProjectParts(const Utils::FileName
 
     setRootProjectNode(std::move(root));
 
-    addTarget(createTarget(m_kit.get()));
-
     m_cppCodeModelUpdater->update({this, cToolchain, cxxToolchain, m_kit.get(), rpps});
 
     emitParsingFinished(true);
@@ -321,6 +319,9 @@ CompilationDatabaseProject::CompilationDatabaseProject(const Utils::FileName &pr
 
     m_kit.reset(KitManager::defaultKit()->clone());
 
+    connect(this, &CompilationDatabaseProject::parsingFinished,
+            this, [this]() { addTarget(createTarget(m_kit.get())); });
+
     emitParsingStarted();
 
     const QFuture<void> future = ::Utils::runAsync([this, projectFile](){