WinRT: capability description needs to match device capabilities as well

WinRT has to different types of capabilities, on generic one and one for device specific items. Currently we only handle generic items. However, current Windows Phone only uses the generic one also for device specific capabilities like location.

Hence we only need to create those in the winrt case. Following a full list of capabilities for WinRT on 8.1:

<Capabilities>
<Capability Name="internetClient" />
<Capability Name="enterpriseAuthentication" />
<Capability Name="internetClientServer" />
<Capability Name="musicLibrary" />
<Capability Name="picturesLibrary" />
<Capability Name="privateNetworkClientServer" />
<Capability Name="removableStorage" />
<Capability Name="sharedUserCertificates" />
<Capability Name="videosLibrary" />
<DeviceCapability Name="location" />
<DeviceCapability Name="microphone" />
<DeviceCapability Name="proximity" />
<DeviceCapability Name="webcam" />
</Capabilities>