Backport METH_FASTCALL from Python 3.7 (#328)

third_party/python/Include/eval.h

@@ -15,6 +15,16 @@ PyObject * PyEval_EvalCodeEx(PyObject *co,
 					PyObject *kwdefs, PyObject *closure);
 
 #ifndef Py_LIMITED_API
+PyObject * _PyEval_EvalCodeWithName(
+    PyObject *co,
+    PyObject *globals, PyObject *locals,
+    PyObject **args, Py_ssize_t argcount,
+    PyObject **kwnames, PyObject **kwargs,
+    Py_ssize_t kwcount, int kwstep,
+    PyObject **defs, Py_ssize_t defcount,
+    PyObject *kwdefs, PyObject *closure,
+    PyObject *name, PyObject *qualname);
+
 PyObject * _PyEval_CallTracing(PyObject *func, PyObject *args);
 #endif