hg: build-infra/jdk8: Fixed -d typo

[kelly.ohair at oracle.com]

Changeset: 2338070dc171
Author:    ohair
Date:      2012-08-06 11:27 -0700
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/2338070dc171

Fixed -d typo

! common/bin/test_builds.sh