restore test data README

diff --git a/Lib/test/data/README b/Lib/test/data/README
new file mode 100644 (file)
index 0000000..bd05984
--- /dev/null
+++ b/Lib/test/data/README
@@ -0,0 +1,2 @@
+This empty directory serves as destination for temporary files
+created by some tests, in particular, the test_codecmaps_* tests.