Fix the build: add missing #includes

<QWidget> for QWidget, <QDataStream> for QDataStream and <QMetaObject>
for Q_GADGET (technically, qobjectdefs.h)

Change-Id: Ia7e8b12ff4c67827bb7782a0337714e330de1db1
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

share/qtcreator/qml/qmlpuppet/container/addimportcontainer.cpp

@@ -30,6 +30,7 @@
 #include "addimportcontainer.h"
 
 #include <QDebug>
+#include <QDataStream>
 
 namespace QmlDesigner {
 

src/libs/qmljs/qmljscodeformatter.h

@@ -38,6 +38,7 @@
 #include <QStack>
 #include <QList>
 #include <QVector>
+#include <QMetaObject>
 
 QT_BEGIN_NAMESPACE
 class QTextDocument;

src/libs/utils/tooltip/tipcontents.h

@@ -34,6 +34,7 @@
 
 #include <QString>
 #include <QColor>
+#include <QWidget>
 
 namespace Utils {
 

src/shared/qtsingleapplication/qtlocalpeer.cpp

@@ -30,6 +30,7 @@
 #include "qtlocalpeer.h"
 
 #include <QCoreApplication>
+#include <QDataStream>
 #include <QTime>
 
 #if defined(Q_OS_WIN)