Add DTLS_with_buffers_method.

WebRTC will need this (probably among other things) to lose crypto/x509
at some point.

Bug: chromium:706445
Change-Id: I988e7300c4d913986b6ebbd1fa4130548dde76a4
Reviewed-on: https://boringssl-review.googlesource.com/18904
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/ssl/tls_method.cc b/ssl/tls_method.cc
index 89ff9ad..b2c7b46 100644
--- a/ssl/tls_method.cc
+++ b/ssl/tls_method.cc
@@ -155,7 +155,7 @@
 static void ssl_noop_x509_ssl_ctx_free(SSL_CTX *ctx) { }
 static void ssl_noop_x509_ssl_ctx_flush_cached_client_CA(SSL_CTX *ctx) {}
 
-static const SSL_X509_METHOD ssl_noop_x509_method = {
+const SSL_X509_METHOD ssl_noop_x509_method = {
   ssl_noop_x509_check_client_CA_names,
   ssl_noop_x509_clear,
   ssl_noop_x509_free,