Only run DANE tests when EC is supported

Since danetest is to test DANE rather than specific algorithms, it's
acceptable to require EC when testing it.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>

test/recipes/80-test_dane.t

@@ -3,9 +3,13 @@
 use strict;
 use warnings;
 use OpenSSL::Test qw/:DEFAULT top_dir top_file/;
+use OpenSSL::Test::Utils;
 
 setup("test_dane");
 
+plan skip_all => "test_dane uses ec which is not supported by this OpenSSL build"
+    if disabled("ec");
+
 plan tests => 1;                # The number of tests being performed
 
 ok(run(test(["danetest", "example.com",