Travis: Build POSIX before unit tests

.travis.yml

@@ -60,23 +60,23 @@ env:
 script:
   - ccache -z
   - arm-none-eabi-gcc --version
-  - echo 'Running Tests..' && echo -en 'travis_fold:start:script.1\\r'
+  - echo 'Building POSIX Firmware..' && echo -en 'travis_fold:start:script.1\\r'
+  - make posix -j4
+  - ccache -s
+  - echo -en 'travis_fold:end:script.1\\r'
+  - echo 'Running Tests..' && echo -en 'travis_fold:start:script.2\\r'
   - make tests
   - cat src/modules/systemlib/mixer/mixer_multirotor.generated.h
-  - echo -en 'travis_fold:end:script.1\\r'
-  - echo 'Building NuttX..' && echo -en 'travis_fold:start:script.2\\r'
-  - make archives
-  - ccache -s
   - echo -en 'travis_fold:end:script.2\\r'
-  - echo 'Building NuttX Firmware..' && echo -en 'travis_fold:start:script.3\\r'
-  - make -j4
+  - echo 'Building NuttX..' && echo -en 'travis_fold:start:script.3\\r'
+  - make archives
   - ccache -s
   - echo -en 'travis_fold:end:script.3\\r'
-  - zip Firmware.zip Images/*.px4
-  - echo 'Building POSIX Firmware..' && echo -en 'travis_fold:start:script.4\\r'
-  - make posix -j4
+  - echo 'Building NuttX Firmware..' && echo -en 'travis_fold:start:script.4\\r'
+  - make -j4
   - ccache -s
   - echo -en 'travis_fold:end:script.4\\r'
+  - zip Firmware.zip Images/*.px4
 
 after_script:
   - git clone git://github.com/PX4/CI-Tools.git