Support nvidia wayland bit depth over 8 bit (fixes incorrect colors on some systems running kde plasma)

include/color_conversion.h

@@ -9,7 +9,7 @@ typedef enum {
 } gsr_source_color;
 
 typedef enum {
-    GSR_DESTINATION_COLOR_RGB,
+    GSR_DESTINATION_COLOR_BGR,
     GSR_DESTINATION_COLOR_NV12 /* YUV420, BT709, limited */
 } gsr_destination_color;