tslib: use main project page in Config.in help text

Signed-off-by: Martin Kepplinger <martin.kepplinger@ginzinger.com>
[Thomas: instead of adding tslib.org, just replace the github address by
the tslib.org one, which is the really upstream homepage.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/tslib/Config.in

@@ -4,7 +4,7 @@ config BR2_PACKAGE_TSLIB
 	help
 	  Tslib is a filtering layer for touchscreen panel events.
 
-	  https://github.com/kergoth/tslib
+	  http://tslib.org
 
 comment "tslib needs a toolchain w/ dynamic library"
 	depends on BR2_STATIC_LIBS