Fixed typo in runtime lib

Ping @MelodyLucid: you have to update the version of the miniboxing plugin to 0.3-SNAPSHOT
and the scala version to 2.11.1 to use the new plugin. See this link:
https://github.com/miniboxing/miniboxing-example/commit/a50b3ac2058fa2036b75cb64adee413f9f500e50#diff-1