make clean added at start of every engine build
diff --git a/.travis.yml b/.travis.yml
index f198940..3fa925c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -36,17 +36,17 @@
script:
- cd nlp-ner-engine
- - make marvin
+ - make clean marvin
- marvin test
- cd ..
- cd sms-spam-engine
- - make marvin
+ - make clean marvin
- marvin test
- cd ..
- cd iris-species-engine
- - make marvin
+ - make clean marvin
- marvin test
- cd ..
- cd mnist-keras-engine
- - make marvin
+ - make clean marvin
- marvin test