travis-ci run check_format

.travis.yml

@@ -14,6 +14,11 @@ matrix:
       services:
         - docker
       env: BUILD_TARGET=qgc_firmware
+    - os: linux
+      sudo: required
+      services:
+        - docker
+      env: BUILD_TARGET=check_format
     - os: linux
       sudo: required
       services:
@@ -43,6 +48,8 @@ env:
 script:
   - if [[ "${BUILD_TARGET}" = "qgc_firmware" && "${TRAVIS_BRANCH}" != "coverity" ]]; then
       ./Tools/docker_run.sh 'make qgc_firmware';
+    elif [[ "${BUILD_TARGET}" = "check_format" && "${TRAVIS_BRANCH}" != "coverity" ]]; then
+      ./Tools/docker_run.sh 'make check_format';
     elif [[ "${BUILD_TARGET}" = "clang-tidy" && "${TRAVIS_BRANCH}" != "coverity" ]]; then
       PX4_DOCKER_REPO=px4io/px4-dev-clang ./Tools/docker_run.sh 'make clang-tidy';
     elif [ "${TRAVIS_OS_NAME}" = "osx" ]; then