message: try to fix travis build (4)
diff: @@ -49,7 +49,7 @@ before_script:
  mkdir release install
  cd release
  cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -DBUILD_PERF_TESTS=OFF -DBUILD_TESTS=OFF -DINSTALL_TESTS=OFF -DBUILD_DOCS=OFF -DBUILD_EXAMPLES=OFF -DBUILD_opencv_apps= -DWITH_IPP=OFF -DCMAKE_INSTALL_PREFIX=/usr ..
  - make -j4 install
  + sudo make -j4 install
  fi
  - tree /tmp/opencv/opencv-$OPENCV_VERSION/release
  - pkg-config --cflags opencv
  