Update tox to notify pytest must be run on beagle

pdp7 · pdp7 · commit e105c8f14a8b · 2017-01-10T08:59:02.000Z
diff --git a/tox.ini b/tox.ini
@@ -7,5 +7,6 @@
 envlist = py27, py34
 
 [testenv]
-commands =
+commands = echo "run pytest on beaglebone"
 deps =
+whitelist_externals = echo
