SF 1668596/1720897: distutils now copies data files
even if package_dir is empty.

This needs to be backported.  I'm too tired tonight.  It would be great
if someone backports this if the buildbots are ok with it.  Otherwise,
I will try to get to it tomorrow.
diff --git a/Misc/NEWS b/Misc/NEWS
index e3577db..33c45ca 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -220,6 +220,9 @@
 Library
 -------
 
+- SF 1668596/1720897: distutils now copies data files
+  even if package_dir is empty.
+
 - sha now raises a DeprecationWarning upon import.
 
 - md5 now raises a DeprecationWarning upon import.