Ignore profiling

Change-Id: Ifecfc82e524ddd2589924c89ec77053ffaec3f0d
diff --git a/voltha/adapters/adtran_olt/.gitignore b/voltha/adapters/adtran_olt/.gitignore
index 99e78d8..2aa6d20 100644
--- a/voltha/adapters/adtran_olt/.gitignore
+++ b/voltha/adapters/adtran_olt/.gitignore
@@ -1,2 +1,3 @@
 htmlcov/
 venv/
+prof/