Add bubblewrap to bindep / test-setup.sh

Bubblewrap is a setuid wrapper for unprivileged chroot and namespace
manipulation. We'll be using this to run ansible-playbook from.

Change-Id: I7c6414281724d066812094d02a726df357978076
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
diff --git a/bindep.txt b/bindep.txt
index 6895444..5db144b 100644
--- a/bindep.txt
+++ b/bindep.txt
@@ -14,3 +14,4 @@
 libffi-devel [platform:rpm]
 python-dev [platform:dpkg]
 python-devel [platform:rpm]
+bubblewrap [platform:rpm]