stress: update homepage link

The old link returns HTTP 404 error.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/stress/Config.in

@@ -6,4 +6,4 @@ config BR2_PACKAGE_STRESS
 	  It imposes a configurable amount of CPU, memory, I/O, and
 	  disk stress on the system.
 
-	  http://weather.ou.edu/~apw/projects/stress/
+	  http://people.seas.harvard.edu/~apw/stress/