xfsprogs: update homepage link

The old SGI site is not accessible anymore. Use the link from the README
file.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 1fa2f7646f11e775fc8f2e5ba729a2efb9b2e653)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/xfsprogs/Config.in

@@ -13,4 +13,4 @@ config BR2_PACKAGE_XFSPROGS
 	help
 	  The XFS file system utilities and libraries
 
-	  http://oss.sgi.com/projects/xfs/
+	  http://xfs.org