Bump github.com/golang/glog from 1.2.0 to 1.2.1

Bumps github.com/golang/glog from 1.2.0 to 1.2.1.

Release notes

Sourced from github.com/golang/glog's releases.

v1.2.1

What's Changed

• glog: don't hold mutex when sync'ing by @​chressie in golang/glog#68

Full Changelog: https://github.com/golang/glog/compare/v1.2.0...v1.2.1

Commits

• 861d094 glog: don't hold mutex when sync'ing (#68)
• See full diff in compare view