Enable usage of java binary in a path with spaces

Author: sunflsks

dist/linux/blobsaver

@@ -26,4 +26,4 @@ else
 fi
 # find the directory this bash script is in (https://stackoverflow.com/a/246128/)
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" > /dev/null 2>&1 && pwd)"
-$JAVA -jar "$DIR/blobsaver.jar" "$@"
+"$JAVA" -jar "$DIR/blobsaver.jar" "$@"