hg: jigsaw/m2: Fixed race causing empty MODULES line in release file

[erik . joelsson]

Changeset: 77b7d1ff7127
Author:    erikj
Date:      2014-11-19 16:58 +0100
URL:       http://hg.openjdk.java.net/jigsaw/m2/rev/77b7d1ff7127

Fixed race causing empty MODULES line in release file

! make/Images.gmk