Add ignore file for new genl

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
diff --git a/genl/.gitignore b/genl/.gitignore
new file mode 100644
index 0000000..383ef04
--- /dev/null
+++ b/genl/.gitignore
@@ -0,0 +1 @@
+genl