message: Compress the contents of the folder, not the folder itself
diff: @@ -53,4 +53,4 @@ for bt in "${BUILD_TYPES[@]}"; do
  done
  rm -f "realm-core-android-$(git describe).tar.gz"
  -tar -czvf "realm-core-android-$(git describe).tar.gz" core-android
  +tar -czvf "realm-core-android-$(git describe).tar.gz" -C core-android .
  