hg: jigsaw/m2: Fixed intermittent windows build fail

[erik . joelsson]

Changeset: f06bc8eb2756
Author:    erikj
Date:      2014-09-22 16:04 +0200
URL:       http://hg.openjdk.java.net/jigsaw/m2/rev/f06bc8eb2756

Fixed intermittent windows build fail

! make/Main.gmk