Implement the more specific PEP 302 semantics for loaders and what happens upon
load failure in relation to reloads. Also expose
importlib.util.module_for_loader to handle all of the details of this along
with making sure all current loaders behave nicely.
diff --git a/Lib/importlib/util.py b/Lib/importlib/util.py
new file mode 100644
index 0000000..6250d5b
--- /dev/null
+++ b/Lib/importlib/util.py
@@ -0,0 +1,2 @@
+"""Utility code for constructing importers, etc."""
+from ._bootstrap import module_for_loader