ci: Fixing unit tests (unit test binary has changed paths)

Change-Id: Ica2af3e4325c5ae9ebfab2905e879f8ebc72f1b9
diff --git a/.travis.yml b/.travis.yml
index b187ec4..09efa71 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,4 +30,4 @@
   - ndnd-tlv-start
   - sleep 1
   - #
-  - ./build/tests/unit-tests -l all
+  - ./build/unit-tests -l all