Splitting finish_message to finish_message/queue_message.

This is to allow for PSK binders to be munged into the ClientHello as part of
draft 18.

BUG=112

Change-Id: Ic4fd3b70fa45669389b6aaf55e61d5839f296748
Reviewed-on: https://boringssl-review.googlesource.com/12228
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
diff --git a/ssl/dtls_method.c b/ssl/dtls_method.c
index 9d791b5..8026579 100644
--- a/ssl/dtls_method.c
+++ b/ssl/dtls_method.c
@@ -142,6 +142,7 @@
     dtls1_supports_cipher,
     dtls1_init_message,
     dtls1_finish_message,
+    dtls1_queue_message,
     dtls1_write_message,
     dtls1_send_change_cipher_spec,
     dtls1_expect_flight,