Tox: don't check stack-screenrc with bashate

Change-Id: I8f04de2cde8a123c3825e7ba22aef1f5b311f61c
Closes-Bug: #1531885
diff --git a/tox.ini b/tox.ini
index f9d04f2..07e8a8f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,7 @@
          -type f                                 \
          -not -name \*~                          \
          -not -name \*.md                        \
+         -not -name stack-screenrc               \
          \(                                      \
           -name \*.sh -or                        \
           -name \*.orig -or                      \