Added a linkmodel attribute, showing how Python was built. This is so

packages can check that extension modules are built for the right type
of python. Current values can be static, framework, shared and cfm (for
completeness, for MacPyton-OS9).

Closes bug #691889. The reporter suggests backporting this to 2.2.3
and I think I agree.

Mac/Modules/macosmodule.c

@@ -764,5 +764,18 @@ initMacOS(void)
 	if (PyDict_SetItemString(d, "runtimemodel", 
 				Py_BuildValue("s", PY_RUNTIMEMODEL)) != 0)
 		return;
+#if !TARGET_API_MAC_OSX
+#define PY_LINKMODEL "cfm"
+#elif defined(WITH_NEXT_FRAMEWORK)
+#define PY_LINKMODEL "framework"
+#elif defined(Py_ENABLE_SHARED)
+#define PY_LINKMODEL "shared"
+#else
+#define PY_LINKMODEL "static"
+#endif
+	if (PyDict_SetItemString(d, "linkmodel", 
+				Py_BuildValue("s", PY_LINKMODEL)) != 0)
+		return;
+
 }