Move debian dir to the master

Add debian dir to combine building workflow

Change-Id: I1cf3361a17a3669c95da9edfe7c8412521b2b6c4
PROD: https://mirantis.jira.com/browse/PROD-20910
diff --git a/debian/watch b/debian/watch
new file mode 100644
index 0000000..d2eb4bd
--- /dev/null
+++ b/debian/watch
@@ -0,0 +1,3 @@
+version=3
+opts="uversionmangle=s/\.(b|rc)/~$1/" \
+https://github.com/openstack/salt-formula-nova/tags .*/(\d[\d\.]+)\.tar\.gz