Add .swp to .gitignore

Change-Id: I3e8088299bb5ca009d8829a9e6445e95b2fdb21e
diff --git a/.gitignore b/.gitignore
index 485dee6..ae8e990 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 .idea
+.*.swp