Add dummy implementation of SecureSocket_Renegotiate to Android platform.

runtime/bin/secure_socket_unsupported.cc

Index: runtime/bin/secure_socket_unsupported.cc
diff --git a/runtime/bin/secure_socket_unsupported.cc b/runtime/bin/secure_socket_unsupported.cc
index 99e5e3babd88e09b7d4fe4e68e5cdd87f92451d4..de97dc8024eb7ee994db7154d6e1cf8b4b060834 100644
--- a/runtime/bin/secure_socket_unsupported.cc
+++ b/runtime/bin/secure_socket_unsupported.cc
@@ -95,6 +95,14 @@ void FUNCTION_NAME(SecureSocket_FilterPointer)(Dart_NativeArguments args) {
 }
 
 
+void FUNCTION_NAME(SecureSocket_Renegotiate)(Dart_NativeArguments args) {
+  Dart_EnterScope();
+  Dart_ThrowException(DartUtils::NewDartArgumentError(
+      "Secure Sockets unsupported on this platform"));
+  Dart_ExitScope();
+}
+
+
 void FUNCTION_NAME(SecureSocket_NewServicePort)(Dart_NativeArguments args) {
   Dart_EnterScope();
   Dart_ThrowException(DartUtils::NewDartArgumentError(