Internal siphash tests are not run.

Reviewed-by: NAndy Polyakov <appro@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2649)

test/recipes/03-test_internal.t

@@ -19,7 +19,8 @@ my %known_internal_tests =
     poly1305_internal_test => !disabled("poly1305") && !$shared_windows,
     modes_internal_test => !$shared_windows,
     asn1_internal_test => !$shared_windows,
-    x509_internal_test => !$shared_windows );
+    x509_internal_test => !$shared_windows,
+    siphash_internal_test => !disabled("siphash") && !$shared_windows );
 
 plan tests => scalar keys %known_internal_tests;