travis-ci pip install --user

.travis.yml

@@ -121,7 +121,7 @@ script:
 
 after_success:
   - if [[ "${TRAVIS_OS_NAME}" = "android" && "${TRAVIS_PULL_REQUEST}" = "false" && "${TRAVIS_BRANCH}" = "master" ]]; then
-         pip install google-api-python-client
+      pip install --user google-api-python-client
       && openssl aes-256-cbc -K $encrypted_25db6eb7c3fd_key -iv $encrypted_25db6eb7c3fd_iv -in Google_Play_Android_Developer-bb93ae7d61ca.p12.enc -out android/Google_Play_Android_Developer-bb93ae7d61ca.p12 -d
       && ./tools/google_play_upload.py org.mavlink.qgroundcontrol release/package/qgroundcontrol.apk
       ;