Bug #794140: cygwin builds do not embed

The embed2.diff patch solves the user's problem by exporting the missing
symbols from the Python core so Python can be embedded in another Cygwin
application (well, at lest vim).

Python/import.c

@@ -2841,7 +2841,7 @@ setint(PyObject *d, char *name, int value)
 	return err;
 }
 
-void
+PyMODINIT_FUNC
 initimp(void)
 {
 	PyObject *m, *d;

Python/marshal.c

@@ -875,7 +875,7 @@ static PyMethodDef marshal_methods[] = {
 	{NULL,		NULL}		/* sentinel */
 };
 
-void
+PyMODINIT_FUNC
 PyMarshal_Init(void)
 {
 	(void) Py_InitModule("marshal", marshal_methods);