Capture publish log (apache-spark-on-k8s#264)

Author: robert3005

circle.yml

@@ -76,10 +76,10 @@ deployment:
   release:
     tag: /[0-9]+(?:\.[0-9]+){2,}-palantir\.[0-9]+(?:\.[0-9]+)*/
     commands:
-      - dev/publish.sh
+      - dev/publish.sh | tee -a "$CIRCLE_ARTIFACTS/publish.log"
       - curl -u $BINTRAY_USERNAME:$BINTRAY_PASSWORD -X POST https://api.bintray.com/content/palantir/releases/spark/$(git describe --tags)/publish
   snapshot:
     branch: master
     commands:
-      - dev/publish.sh
+      - dev/publish.sh | tee -a "$CIRCLE_ARTIFACTS/publish.log"
       - curl -u $BINTRAY_USERNAME:$BINTRAY_PASSWORD -X POST https://api.bintray.com/content/palantir/releases/spark/$(git describe --tags)/publish