Missing security violation error message if "webview" is not defined for a WebView app in QML

[XiaoGuo, Liu]

If I do not define "webview" security policy in my app, when depolying my app onto the phone, it does not have any complaining message, just simply:

Loading module: 'libubuntu_application_api_touch_mirclient.so.3.0.0'
LaunchProcess: failed to execvp:
/usr/lib/arm-linux-gnueabihf/oxide-qt/chrome-sandbox

The error is not obvious to developers. For some other type of security violations, there are normally some permission denied error messages being displayed in the Application Output window.

Best regards,
XiaoGuo