package/linux-fusion: add an upstream URL to Config.in

Add an upstream URL to the help text in Config.in. This
addresses the 'Missing' URL status in the package stats
web page output.

Signed-off-by: Mark Corbin <mark@dibsco.co.uk>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/linux-fusion/Config.in

@@ -8,3 +8,5 @@ config BR2_PACKAGE_LINUX_FUSION
 	help
 	  DirectFB Communication Layer allowing multiple DirectFB
 	  applications to run concurrently
+
+	  https://github.com/deniskropp/linux-fusion