Perform build and magnum tuning

Building o//third_party/python now takes 5 seconds on my PC

This change works towards modifying Python to use runtime dispatching
when appropriate. For example, when loading the magnums in the socket
module, it's a good idea to check if the magnum is zero, because that
means the local system platform doesn't support it.

third_party/python/Include/boolobject.h

@@ -1,11 +1,7 @@
-/* Boolean object interface */
-
 #ifndef Py_BOOLOBJECT_H
 #define Py_BOOLOBJECT_H
-#ifdef __cplusplus
-extern "C" {
-#endif
-
+COSMOPOLITAN_C_START_
+/* clang-format off */
 
 PyAPI_DATA(PyTypeObject) PyBool_Type;
 
@@ -18,17 +14,15 @@ Don't forget to apply Py_INCREF() when returning either!!! */
 PyAPI_DATA(struct _longobject) _Py_FalseStruct, _Py_TrueStruct;
 
 /* Use these macros */
-#define Py_False ((PyObject *) &_Py_FalseStruct)
-#define Py_True ((PyObject *) &_Py_TrueStruct)
+#define Py_False ((PyObject *)&_Py_FalseStruct)
+#define Py_True  ((PyObject *)&_Py_TrueStruct)
 
 /* Macros for returning Py_True or Py_False, respectively */
-#define Py_RETURN_TRUE return Py_INCREF(Py_True), Py_True
+#define Py_RETURN_TRUE  return Py_INCREF(Py_True), Py_True
 #define Py_RETURN_FALSE return Py_INCREF(Py_False), Py_False
 
 /* Function to return a bool from a C long */
 PyAPI_FUNC(PyObject *) PyBool_FromLong(long);
 
-#ifdef __cplusplus
-}
-#endif
+COSMOPOLITAN_C_END_
 #endif /* !Py_BOOLOBJECT_H */