Issue #2377: Make importlib the implementation of __import__().
importlib._bootstrap is now frozen into Python/importlib.h and stored
as _frozen_importlib in sys.modules. Py_Initialize() loads the frozen
code along with sys and imp and then uses _frozen_importlib._install()
to set builtins.__import__() w/ _frozen_importlib.__import__().
diff --git a/Include/import.h b/Include/import.h
index 45544111..bc21ae2 100644
--- a/Include/import.h
+++ b/Include/import.h
@@ -7,6 +7,9 @@
extern "C" {
#endif
+PyAPI_FUNC(void) _PyImportZip_Init(void);
+
+PyMODINIT_FUNC PyInit_imp(void);
PyAPI_FUNC(long) PyImport_GetMagicNumber(void);
PyAPI_FUNC(const char *) PyImport_GetMagicTag(void);
PyAPI_FUNC(PyObject *) PyImport_ExecCodeModule(