Begin incorporating Python unit tests into build

We now build a separate APE binary for each test so they can run in
parallel. We've got 148 tests running fast and stable so far.

third_party/python/Lib/test/test_gzip.py

@@ -9,12 +9,14 @@ import pathlib
 import struct
 import sys
 import unittest
+from encodings import utf_16
 from subprocess import PIPE, Popen
 from test import support
 from test.support import _4G, bigmemtest
 from test.support.script_helper import assert_python_ok
 
 gzip = support.import_module('gzip')
+if __name__ == 'PYOBJ.COM': import gzip
 
 data1 = b"""  int length=DEFAULTALLOC, err = Z_OK;
   PyObject *RetVal;