Update .travis.yml

.travis.yml

@@ -1,7 +1,10 @@
 dist: xenial
 language: cpp
 cache: ccache
-matrix:
+os:
+  - linux
+  - osx
+jobs:
   include:
     - compiler: gcc
       os: linux
@@ -30,9 +33,6 @@ script:
         export PATH=/usr/local/opt/qt/bin:$PATH;
     fi
   - cmake -DCMAKE_CXX_COMPILER=$CXX_COMPILER -DCMAKE_C_COMPILER=$C_COMPILER  .. && make -j3
-after_success:
-  - cd ../sample && $CXX_COMPILER -std=c++11 -O3 main_clock.cpp -o test_clock && ./test_clock
-  - ./build_express_test.sh
 install:
   - if [ "$TRAVIS_OS_NAME" = "osx" ]; then
         brew install gcc5;