Add staticcheck to bin/tools script
Also set GO111MODULE=off so `go get` doesn't modify our `go.mod`
and installs the tools into $GOPATH/bin instead.
#!/bin/bash
-set -e
+export GO111MODULE=on
+pushd ~
go get -u golang.org/x/lint/golint
go get -u github.com/maxbrunsfeld/counterfeiter
go get -u github.com/onsi/ginkgo/ginkgo
+go get -u honnef.co/go/tools/...
+popd
