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/collections/abc.py

@@ -1,27 +1,29 @@
-from _collections_abc import (
-    Awaitable,
-    Coroutine,
-    AsyncIterable,
-    AsyncIterator,
-    AsyncGenerator,
-    Hashable,
-    Iterable,
-    Iterator,
-    Generator,
-    Reversible,
-    Sized,
-    Container,
-    Callable,
-    Collection,
-    Set,
-    MutableSet,
-    Mapping,
-    MutableMapping,
-    MappingView,
-    KeysView,
-    ItemsView,
-    ValuesView,
-    Sequence,
-    MutableSequence,
-    ByteString,
-)
+from _collections_abc import *
+from _collections_abc import __all__
+
+if __name__ == 'PYOBJ.COM':
+    AsyncGenerator = 0
+    AsyncIterable = 0
+    AsyncIterator = 0
+    Awaitable = 0
+    ByteString = 0
+    Callable = 0
+    Collection = 0
+    Container = 0
+    Coroutine = 0
+    Generator = 0
+    Hashable = 0
+    ItemsView = 0
+    Iterable = 0
+    Iterator = 0
+    KeysView = 0
+    Mapping = 0
+    MappingView = 0
+    MutableMapping = 0
+    MutableSequence = 0
+    MutableSet = 0
+    Reversible = 0
+    Sequence = 0
+    Set = 0
+    Sized = 0
+    ValuesView = 0