Start fuzzing the TLS 1.3 code.

Corpus recorded from runner and merged into existing corpus with
libFuzzer's -merge flag.

BUG=79

Change-Id: I986a50976ffef141b63e31de3a81fdb4ed5c1348
Reviewed-on: https://boringssl-review.googlesource.com/11130
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
diff --git a/fuzz/server.cc b/fuzz/server.cc
index 75522ba..5334102 100644
--- a/fuzz/server.cc
+++ b/fuzz/server.cc
@@ -226,6 +226,7 @@
   BIO *out = BIO_new(BIO_s_mem());
   SSL_set_bio(server, in, out);
   SSL_set_accept_state(server);
+  SSL_set_max_version(server, TLS1_3_VERSION);
 
   BIO_write(in, buf, len);
   if (SSL_do_handshake(server) == 1) {