package/fbdump: Add project URL to Config.in

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

package/fbdump/Config.in

@@ -5,3 +5,5 @@ config BR2_PACKAGE_FBDUMP
 	  framebuffer  device and write them out as a PPM file. Currently,
 	  most packed-pixel framebuffer formats and the vga16 framebuffer
 	  are supported.
+
+	  http://www.rcdrummond.net/fbdump