Add tests for full handshakes under renegotiation.

In verifying the fix for CVE-2015-0291, I noticed we don't actually have any
test coverage for full handshakes on renegotiation. All our tests always do
resumptions.

Change-Id: Ia9b701e8a50ba9353fefb8cc4fb86e78065d0b40
Reviewed-on: https://boringssl-review.googlesource.com/4050
Reviewed-by: Adam Langley <agl@google.com>
4 files changed