Mark stout as important as its stable enough for paladin and we want prebuilts.
Mark stout as important as its stable enough for paladin and we want prebuilts.

BUG=chrome-os-partner:11944
TEST=unittests

Change-Id: I6c742fd5de39da742a01dc796f8e41057f97d993
Reviewed-on: https://gerrit.chromium.org/gerrit/28636
Tested-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Reviewed-by: Ryan Cui <5ce1592d53754a87a44fc2eb7b63d5f77cf50fdb@chromium.org>
Commit-Ready: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>

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