Log Message:
Update Go to 1.5.2, original patch from Kamel Derouiche in PR pkg/50498.

go1.5.2 (released 2015/12/02) includes bug fixes to the compiler,
linker, and the mime/multipart, net, and runtime packages. See the Go
1.5.2 milestone on our issue tracker for details.

https://github.com/golang/go/issues?q=milestone%3AGo1.5.2