Use new unit test script.
Use new unit test script.

Change-Id: I8358ab0735d29b91bfa49d434aa3476549c5168f

BUG=chromium-os:13498
TEST=Ran it myself inside chroot.

Review URL: http://codereview.chromium.org/6745023

bpsinc-native/src_third_party_chromite,zhang0137/chromite,chadversary/chromiumos.chromite,zhang0137/chromite,bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,coreos/chromite,coreos/chromite,zhang0137/chromite,coreos/chromite