buildupdate-755254: Use standard header for promise.js
buildupdate-755254: Use standard header for promise.js

Updating dryice to recognise all that is an exercise in frustration.

Signed-off-by: Joe Walker <7a17872fbb32c7d760c9a16ee3076daead11efcf@mozilla.com>

joewalker/gcli,mozilla/gcli,mozilla/gcli,mozilla/gcli,joewalker/gcli