test: add crypto check to test-benchmark-tls

Currently when building --without-ssl a 'ERR_NO_CRYPTO' error is
reported.

This is not currently being picked up by the crypto-check lint rule as
it does not actually require any crypto modules directly, but instead
this is done by common/benchmark.

I'll take a closer look at the check and see what can be done but I
don't have time straight away, so creating this commit to avoid breakage
in the short term.

test/sequential/test-benchmark-tls.js

@@ -2,6 +2,9 @@
 
 const common = require('../common');
 
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+
 if (!common.enoughTestMem)
   common.skip('Insufficient memory for TLS benchmark test');