travis: add build/upload task

.travis.yml

@@ -8,12 +8,14 @@ branches:
 
 matrix:
   include:
-  - jdk: oraclejdk8
-    os: linux
-  # env: UPLOAD_ALL=true
+  - os: osx
+    env: BUILD_TASK=":jme3-bullet-native:build" UPLOAD_TASK=":jme3-bullet-native:bintrayUpload"
+  # - jdk: oraclejdk8
+  #   os: linux
+  #   env: GRADLE_TASK="check"
   # - jdk: openjdk7
   #   os: linux
-  # - os: osx
+  #   env: GRADLE_TASK="check"
 
 addons:
   apt:
@@ -36,11 +38,10 @@ cache:
 install:
 
 script:
-  - ./gradlew :jme3-bullet-native:build
-  # - ./gradlew check
+  - './gradlew "$BUILD_TASK"'
 
 after_success:
-  - '[ -n "$TRAVIS_TAG" ] && [ "$TRAVIS_PULL_REQUEST" == "false" ] && [ -n "$UPLOAD_ALL" ] && ./gradlew bintrayUpload || :'
+  - '[ -n "$TRAVIS_TAG" ] && [ "$TRAVIS_PULL_REQUEST" == "false" ] && ./gradlew "$UPLOAD_TASK" || :'
 
 notifications:
   slack: