package/libvncserver: requires DES support in openssl

Enable DES in openssl to fix build failure raised since commit
a83d41867c8d69a77d5cd0a665aa216af5340359

Fixes:
 - http://autobuild.buildroot.org/results/3dd9a97e7faa99bab12d7acb069e8414e17f67e9

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/libvncserver/Config.in

@@ -5,6 +5,7 @@ config BR2_PACKAGE_LIBVNCSERVER
 	depends on !BR2_nios2
 	depends on !BR2_STATIC_LIBS
 	select BR2_PACKAGE_LZO
+	select BR2_PACKAGE_LIBOPENSSL_ENABLE_DES if BR2_PACKAGE_LIBOPENSSL
 	help
 	  libvncserver is a VNC server/client library.