Use different capsule names with and without -builtin

Types generated with and without -builtin are not compatible. Mixing
them in a common type list leads to crashes. Avoid this by using
different capsule names: "type_pointer_capsule" without -builtin and
"type_pointer_capsule_builtin" with.

See #1684

Examples/test-suite/python_runtime_data_builtin.i

@@ -0,0 +1,15 @@
+// Test swig_runtime_data with and without -builtin
+
+%module python_runtime_data_builtin
+
+%inline %{
+#ifdef SWIGPYTHON_BUILTIN
+bool is_python_builtin() { return true; }
+#else
+bool is_python_builtin() { return false; }
+#endif
+%}
+
+%include std_vector.i
+
+%template(vectord) std::vector<double>;