Fix the inputKeyboardLayout type to bool

Switch the inputKeyboardLayout attribute from string type to bool type as the spec SystemInfo API(https://developer.tizen.org/dev-guide/2.2.0/org.tizen.web.device.apireference/tizen/systeminfo.html#::SystemInfo::SystemInfoDeviceCapability) required.
`o["inputKeyboardLayout"] = picojson::value(s != NULL && s != "none");` 

And please squash the two commits into one.

Then LGTM