Add Go tool

Review Request #10302 — Created Nov. 1, 2018 and discarded — Latest diff uploaded

Information

ReviewBot
master

Reviewers

This patch adds a Go Tool to Review Bot for static analysis of Go code.
It makes use of the following two Go commands:

  1. go tool vet # static code analysis to find possible bugs or suspicious
    constructs

  1. gofmt # formats the code

Manual tests. Successfuly adds issues at the right line numbers.