hg: jigsaw/m2: Use correct variable for endian argument

[erik . joelsson]

Changeset: c64e15e7c0bd
Author:    erikj
Date:      2014-10-09 13:45 +0200
URL:       http://hg.openjdk.java.net/jigsaw/m2/rev/c64e15e7c0bd

Use correct variable for endian argument

! make/Images.gmk