Inspector: Use user-set sysroot also when opening files in the inspector

Expose the current debugger engine (with it's start parameters) in
Debugger::QmlAdapter, and use it to initialize the FileInProjectFinder
in QmlJSInspector.

Change-Id: I562012868e72ee9369db210e79468e263c53eda6
Reviewed-by: Aurindam Jana <aurindam.jana@nokia.com>
Reviewed-by: Christiaan Janssen <christiaan.janssen@nokia.com>

src/plugins/debugger/qml/qmladapter.cpp

@@ -237,6 +237,11 @@ QDeclarativeDebugConnection *QmlAdapter::connection() const
     return d->m_conn;
 }
 
+DebuggerEngine *QmlAdapter::debuggerEngine() const
+{
+    return d->m_engine.data();
+}
+
 void QmlAdapter::showConnectionStatusMessage(const QString &message)
 {
     if (!d->m_engine.isNull())