libvncserver: gnutls support needs gcrypt as well

Fixes http://autobuild.buildroot.org/results/3b479b8cf751cc0c075ab942b56aad36f79ada71

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/libvncserver/libvncserver.mk

@@ -31,7 +31,7 @@ else
 LIBVNCSERVER_CONF_OPT += --without-gcrypt
 endif
 
-ifeq ($(BR2_PACKAGE_GNUTLS),y)
+ifeq ($(BR2_PACKAGE_GNUTLS)$(BR2_PACKAGE_LIBGCRYPT),yy)
 LIBVNCSERVER_DEPENDENCIES += gnutls host-pkgconf
 else
 LIBVNCSERVER_CONF_OPT += --without-gnutls