hg: jigsaw/jigsaw/jdk: Truncate a module file being written to if it exists

[dalibor.topic at sun.com]

Changeset: 47e9e7172d3d
Author:    robilad
Date:      2010-03-17 11:13 -0700
URL:       http://hg.openjdk.java.net/jigsaw/jigsaw/jdk/rev/47e9e7172d3d

Truncate a module file being written to if it exists

! src/share/classes/org/openjdk/jigsaw/ModuleFileFormat.java