Copy another test reference directory into the build

The build-time tests fail if they can't find this

Author: Rebecca N. Palmer <rebecca_palmer@zoho.com>
Forwarded: not-needed - done in #8870

Gbp-Pq: Name add_missing_test_references.patch

diff --git a/statsmodels/tsa/stl/tests/results/__init__.py b/statsmodels/tsa/stl/tests/results/__init__.py
new file mode 100644 (file)
index 0000000..7a2d5e4
--- /dev/null
+++ b/statsmodels/tsa/stl/tests/results/__init__.py
@@ -0,0 +1 @@
+# do nothing - dpkg-source --commit can't handle empty files