cbuildbot - upload generated image manipulation scripts.
cbuildbot - upload generated image manipulation scripts.

Allows for chromite code to unpack/modify images without cgpt.

BUG=chromium-os:36751
TEST=unit test, pylint, local trybot, remote trybot.

Change-Id: Ia404c46ec5f30ed83f6c94fe109e4bcd947c20a1
Reviewed-on: https://gerrit.chromium.org/gerrit/38867
Commit-Ready: Ryan Cui <5ce1592d53754a87a44fc2eb7b63d5f77cf50fdb@chromium.org>
Reviewed-by: Ryan Cui <5ce1592d53754a87a44fc2eb7b63d5f77cf50fdb@chromium.org>
Tested-by: Ryan Cui <5ce1592d53754a87a44fc2eb7b63d5f77cf50fdb@chromium.org>

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