Add support for platform specific orientation

Hi,

I want to set Manifest.xml activity with android:screenOrientation="nosensor"

http://developer.android.com/guide/topics/manifest/activity-element.html#screen

In cordova doc :
Additionally, you can specify any platform-specific orientation value if you place the <preference> element within a <platform> element:

So, I do it in config.xml

<platform name="android">
<preference name="orientation" value="nosensor" />
</platform>

but on build :
Unsupported global orientation: nosensor. Defaulting to value: default