Import of core OSM charm layers

Signed-off-by: Adam Israel <adam.israel@canonical.com>
Change-Id: Iff2c30e3b952d52891c190ec2d7a31a650e5ad53
diff --git a/charms/layers/sshproxy/.gitignore b/charms/layers/sshproxy/.gitignore
new file mode 100644
index 0000000..b8e7ba3
--- /dev/null
+++ b/charms/layers/sshproxy/.gitignore
@@ -0,0 +1 @@
+trusty/