Update default_build_script.adoc
Update default_build_script.adoc

Escaped the asterisk at end of document to allow it to be a notation from *-impl.xml.
jMonkeyEngine/wiki.jmonkeyengine.org,jMonkeyEngine/wiki.jmonkeyengine.org,jMonkeyEngine/wiki.jmonkeyengine.org,jMonkeyEngine/wiki.jmonkeyengine.org