The TLS 1.3 variants got renumbered (and many dropped).

Change-Id: I75f63e7188bb22eb115e7f4393e67dc696c013c5
Reviewed-on: https://boringssl-review.googlesource.com/24246
Reviewed-by: Steven Valdez <svaldez@google.com>
Commit-Queue: Steven Valdez <svaldez@google.com>

In particular, this starts a new DTLS corpus.

Bug: 124
Change-Id: I0fa0b38ac1cd213cef99badde693e75ed7357ab4
Reviewed-on: https://boringssl-review.googlesource.com/20108
Reviewed-by: David Benjamin <davidben@google.com>