changelog: prepare v2.6.2 release
## Unreleased
+
+## [2.6.2] - 2017-01-31
### Security
- backend/gce: remove service account from booted instances
### Changed
- build_script_generator: accepts `Job` instead of `*simplejson.Json`
+### Fixed
+- log_writer: pass timeout on creation and start timer on first write
+
## [2.6.1] - 2017-01-23
### Fixed
- processor: open log writer early, prevent panic
### Added
- Initial release
-[Unreleased]: https://github.com/travis-ci/worker/compare/v2.6.1...HEAD
+[Unreleased]: https://github.com/travis-ci/worker/compare/v2.6.2...HEAD
+[2.6.2]: https://github.com/travis-ci/worker/compare/v2.6.1...v2.6.2
[2.6.1]: https://github.com/travis-ci/worker/compare/v2.6.0...v2.6.1
[2.6.0]: https://github.com/travis-ci/worker/compare/v2.5.0...v2.6.0
[2.5.0]: https://github.com/travis-ci/worker/compare/v2.4.0...v2.5.0
