Ignore vi backup files.

Change-Id: Ibeb80d1fee84be1cf33321eec0284a0306513646
diff --git a/apps/Tag/.gitignore b/apps/Tag/.gitignore
new file mode 100644
index 0000000..783cd5b
--- /dev/null
+++ b/apps/Tag/.gitignore
@@ -0,0 +1,2 @@
+*.swp
+