src,tools: allow utf-8 in built-in js source code
https://github.com/nodejs/node/pull/4007#issuecomment-188402790 for background.
The meat is in the first commit, the other two are minor efficiency tweaks.
R=@fishrock123
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
https://github.com/nodejs/node/pull/4007#issuecomment-188402790 for background.
The meat is in the first commit, the other two are minor efficiency tweaks.
R=@fishrock123