Clang: Store the symbol kind in the database

It is cleaning up some other stuff too.

Change-Id: I75274356fd35f2ee8c84aedf8839c67506ab2355
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/plugins/clangrefactoring/clangrefactoring.pro

@@ -41,8 +41,7 @@ SOURCES += \
     qtcreatorsearch.cpp \
     qtcreatorsearchhandle.cpp \
     qtcreatorsymbolsfindfilter.cpp \
-    symbolsfindfilterconfigwidget.cpp \
-    symbolquery.cpp
+    symbolsfindfilterconfigwidget.cpp
 
 FORMS += \
     clangqueryprojectsfindfilter.ui

src/plugins/clangrefactoring/symbolquery.cpp

@@ -1,30 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2017 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 as published by the Free Software
-** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-****************************************************************************/
-
-#include "symbolquery.h"
-
-namespace ClangRefactoring {
-
-} // namespace ClangRefactoring