debugger: let debugger attach to currently running process

Change-Id: I4aab1aa84a3dc9211d84d59be76005a8e841239e
(cherry picked from commit 55e399b524721e3561b6c7faae8aef84bf064565)
Reviewed-on: http://codereview.qt.nokia.com/251
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/qmlprojectmanager/qmlprojectruncontrol.cpp

@@ -96,7 +96,7 @@ void QmlProjectRunControl::start()
 {
     m_applicationLauncher.start(ApplicationLauncher::Gui, m_executable,
                                 m_commandLineArguments);
-
+    setApplicationProcessHandle(ProcessHandle(m_applicationLauncher.applicationPID()));
     emit started();
     QString msg = tr("Starting %1 %2\n")
         .arg(QDir::toNativeSeparators(m_executable), m_commandLineArguments);