Issue #15168: Ensure test_importlib subdirectories are installed.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 9c92b51..a421d6c 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -1008,9 +1008,9 @@
lib2to3/tests/data/fixers/myfixes \
ctypes ctypes/test ctypes/macholib idlelib idlelib/Icons \
distutils distutils/command distutils/tests $(XMLLIBSUBDIRS) \
- importlib importlib/test importlib/test/builtin \
- importlib/test/extension importlib/test/frozen \
- importlib/test/import_ importlib/test/source \
+ importlib test/test_importlib test/test_importlib/builtin \
+ test/test_importlib/extension test/test_importlib/frozen \
+ test/test_importlib/import_ test/test_importlib/source \
turtledemo \
multiprocessing multiprocessing/dummy \
unittest unittest/test unittest/test/testmock \