hg: build-infra/jdk8/jdk: Re-enable cross compile from linux 64 bits to linux 32 bits.

[fredrik.ohrstrom at oracle.com]

Changeset: c14c4c1df42b
Author:    ohrstrom
Date:      2012-09-13 20:55 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/jdk/rev/c14c4c1df42b

Re-enable cross compile from linux 64 bits to linux 32 bits.

! makefiles/GensrcMisc.gmk