libgcrypt: link to a more informative homepage

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libgcrypt/Config.in

@@ -4,4 +4,4 @@ config BR2_PACKAGE_LIBGCRYPT
 	help
 	  LibGCrypt is GNU's basic cryptographic library.
 
-	  ftp://gd.tuwien.ac.at/privacy/gnupg/libgcrypt/
+	  http://www.gnu.org/software/libgcrypt/