packaging: only run deployment script when the client hash changes

Change-Id: I24a54bd832b910a524fb7be1e91c8d6387d6bcb9
diff --git a/.gitignore b/.gitignore
index 022e266..508b450 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,3 +22,5 @@
 *.vcxproj
 *.vcxproj.filters
 *qmlcache.qrc
+
+.deploy.stamp