hg: build-infra/jdk8: Increasing mx for javac. Don't know why but hitting exceptions with

[erik.joelsson at oracle.com]

Changeset: 487cdf3d2843
Author:    erikj
Date:      2011-12-22 18:43 +0100
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/487cdf3d2843

Increasing mx for javac. Don't know why but hitting exceptions with
old settings.

! common/autoconf/configure
! common/autoconf/configure.ac