Bypass Python exmples not supported by -builtin

Builtin classes as exceptions not supported, so don't run these aspects
of the examples when using -builtin.

Examples/python/exception/example.i

@@ -10,3 +10,12 @@
 /* Let's just grab the original header file here */
 %include "example.h"
 
+%inline %{
+// The -builtin SWIG option results in SWIGPYTHON_BUILTIN being defined
+#ifdef SWIGPYTHON_BUILTIN
+bool is_python_builtin() { return true; }
+#else
+bool is_python_builtin() { return false; }
+#endif
+%}
+

Examples/python/exception/runme.py

@@ -20,10 +20,17 @@ try:
 except RuntimeError,e:
       print e.args[0]
 
-try:
-      t.hosed()
-except example.Exc,e:
-      print e.code, e.msg
+if not example.is_python_builtin():
+  try:
+        t.hosed()
+  except example.Exc,e:
+        print e.code, e.msg
+else:
+  try:
+        t.hosed()
+  except BaseException,e:
+        # Throwing builtin classes as exceptions not supported (-builtin option)
+        print e
 
 for i in range(1,4):
       try: