package/kodi-visualisation-shadertoy: needs libplatform

Fixes

Makefile:477: *** libplatform is in the dependency chain of
 kodi-visualisation-shadertoy that has added it to its _DEPENDENCIES
 variable without selecting it or depending on it from Config.in.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/kodi-visualisation-shadertoy/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_KODI_VISUALISATION_SHADERTOY
 	bool "kodi-visualisation-shadertoy"
+	select BR2_PACKAGE_LIBPLATFORM
 	help
 	  Shadertoy visualiser for Kodi