hg: graal/graal: mx: fix in java version parsing

[doug.simon at oracle.com]

Changeset: cc30bd72a19b
Author:    Bernhard Urban <bernhard.urban at jku.at>
Date:      2014-07-16 23:37 +0200
URL:       http://hg.openjdk.java.net/graal/graal/rev/cc30bd72a19b

mx: fix in java version parsing

! mxtool/mx.py