Add a test for SSL_OP_TLS_D5_BUG.

If this is part of SSL_OP_ALL, we should have a test for it.

Change-Id: Ia72422beb2da6434726e78e174f3416f90f7c897
Reviewed-on: https://boringssl-review.googlesource.com/1695
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/ssl/test/runner/common.go b/ssl/test/runner/common.go
index 78e484f..fa0e6d8 100644
--- a/ssl/test/runner/common.go
+++ b/ssl/test/runner/common.go
@@ -440,6 +440,11 @@
 	// isn't sent until we receive an application data record
 	// from the peer.
 	ExpectFalseStart bool
+
+	// SSL3RSAKeyExchange causes the client to always send an RSA
+	// ClientKeyExchange message without the two-byte length
+	// prefix, as if it were SSL3.
+	SSL3RSAKeyExchange bool
 }
 
 func (c *Config) serverInit() {