Added build_api tests to travis

Author: theotherjimmy

.travis.yml

@@ -3,6 +3,7 @@ python:
 
 script:
   - PYTHONPATH=. python tools/test/config_test/config_test.py
+  - PYTHONPATH=. python tools/test/build_api/build_api_test.py
   - python tools/test/pylint.py
   - py.test tools/test/toolchains/api.py
   - python tools/test/memap/memap_test.py
@@ -21,3 +22,4 @@ install:
   - sudo pip install pytest
   - sudo pip install pylint
   - sudo pip install hypothesis
+  - sudo pip install mock