Examples update to support C++17: exception specification throw removal

Examples/ruby/exceptproxy/example.i

@@ -17,6 +17,7 @@
 /* The EmpytError doesn't appear in a throw declaration, and hence
   we need to tell SWIG that the dequeue method throws it.  This can
   now be done via the %catchs feature. */
+%catches(FullError) *::enqueue;
 %catches(EmptyError) *::dequeue();