Bug 917793 - Ensure printing exceptions in js build scripts r=yurenju
Bug 917337 - [Clock] Implement Scrolling for Timer Settings

https://bugzilla.mozilla.org/show_bug.cgi?id=917337

- Adds overflow-y: auto to #timer-dialog
- Adds a event.preventDefault() on touchstart on the time picker to stop user from scrolling while spinning inputs

r=jugglinmike
Merge pull request #12299 from ochameau/build-exceptions

Bug 917793 - Ensure printing exceptions in js build scripts r=yurenju