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/test_config.cc b/ssl/test/test_config.cc
index 9d1ffc9..41188af 100644
--- a/ssl/test/test_config.cc
+++ b/ssl/test/test_config.cc
@@ -54,6 +54,7 @@
   { "-no-ssl3", &TestConfig::no_ssl3 },
   { "-cookie-exchange", &TestConfig::cookie_exchange },
   { "-shim-writes-first", &TestConfig::shim_writes_first },
+  { "-tls-d5-bug", &TestConfig::tls_d5_bug },
 };
 
 const size_t kNumBoolFlags = sizeof(kBoolFlags) / sizeof(kBoolFlags[0]);
@@ -95,7 +96,8 @@
       no_tls1(false),
       no_ssl3(false),
       cookie_exchange(false),
-      shim_writes_first(false) {
+      shim_writes_first(false),
+      tls_d5_bug(false) {
 }
 
 bool ParseConfig(int argc, char **argv, TestConfig *out_config) {