compositor-rpi: give the output a name

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

src/compositor-rpi.c

@@ -344,6 +344,7 @@ rpi_output_create(struct rpi_compositor *compositor, uint32_t transform)
 	output->base.subpixel = WL_OUTPUT_SUBPIXEL_UNKNOWN;
 	output->base.make = "unknown";
 	output->base.model = "unknown";
+	output->base.name = strdup("rpi");
 
 	/* guess 96 dpi */
 	mm_width  = modeinfo.width * (25.4f / 96.0f);