Property definitions

android $ NativeAssetFileDescriptor :: create_output_stream
	fun create_output_stream: NativeFileOutputStream in "Java" `{
		try {
			return self.createOutputStream();
		}catch(IOException e){
			Log.e("Error creating output stream", e.getMessage());
			e.printStackTrace();
			return null;
		}
	`}
lib/android/assets_and_resources.nit:366,2--374,3