QmlProfiler: Apply some code cosmetics

Change-Id: I772713aec3a6c25136174b39b853a9ef3ee42a0b
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

src/plugins/qmlprofiler/localqmlprofilerrunner.cpp

@@ -37,9 +37,10 @@
 #include <QTcpServer>
 #include <QTemporaryFile>
 
-using namespace QmlProfiler;
 using namespace ProjectExplorer;
 
+namespace QmlProfiler {
+
 QString LocalQmlProfilerRunner::findFreeSocket()
 {
     QTemporaryFile file;
@@ -140,3 +141,5 @@ void LocalQmlProfilerRunner::stop()
     if (m_launcher.isRunning())
         m_launcher.stop();
 }
+
+} // namespace QmlProfiler