updating gitignore

Change-Id: I09970be510ec4a878d170685c8e032b5110cedd8
diff --git a/.gitignore b/.gitignore
index bd10220..41be305 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,6 +46,9 @@
 .DS_Store
 **/.DS_Store
 
+# Ignore chameleon subdirectory
+chameleon
+
 # Companion git repos used in tests
 loxigen
 mininet