ios: cache app path in deploy step

avoid accessing target and runconfig in the run
method

Change-Id: I2d48ade1313d80e8041ea90f59f53f93858ab6b3
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/ios/iosdeploystep.h

@@ -108,6 +108,7 @@ private:
     IosToolHandler *m_toolHandler;
     QFutureInterface<bool> m_futureInterface;
     ProjectExplorer::IDevice::ConstPtr m_device;
+    QString m_bundlePath;
     static const Core::Id Id;
 };