Ensure each adapter is run as its own make target

Change-Id: I2ba2b0a63ab96caeb36a9e5b2954daf312b9b696
diff --git a/voltha/adapters/adtran_onu/.gitignore b/voltha/adapters/adtran_onu/.gitignore
index 88158a1..a56c3d0 100644
--- a/voltha/adapters/adtran_onu/.gitignore
+++ b/voltha/adapters/adtran_onu/.gitignore
@@ -1,2 +1,3 @@
 htmlcov/
 prof/
+junit-report.xml
\ No newline at end of file