Port over ContinueSelfTest() fix from firmware

Change-Id: Ib12405f968af11ad75a6429ae9ebe502dde5bf92

BUG=chrome-os-partner:1591
TEST=make && make runtests

(This is already in the firmware; I'm just copying it back into vboot reference)

Review URL: http://codereview.chromium.org/5312003
2 files changed