Rebuilt shaders.

examples/makefile

@@ -24,6 +24,7 @@ rebuild:
 	@make -s --no-print-directory rebuild -C 18-ibl
 	@make -s --no-print-directory rebuild -C 19-oit
 #	@make -s --no-print-directory rebuild -C 20-nanovg
+	@make -s --no-print-directory rebuild -C 21-deferred
 	@make -s --no-print-directory rebuild -C common/font
 	@make -s --no-print-directory rebuild -C common/imgui
 	@make -s --no-print-directory rebuild -C common/nanovg