update descriptor-packages build process

Change-Id: I937d0897a051b655f9de87f49a88610a37c9297e
Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>
diff --git a/juju-charms/.gitignore b/juju-charms/.gitignore
new file mode 100644
index 0000000..9f751ef
--- /dev/null
+++ b/juju-charms/.gitignore
@@ -0,0 +1,2 @@
+deps/
+builds/