fix: Mesos/k8s dependency version: golang/glog

`golang/glog` is used by:
- `github.com/mesos/mesos-go` (no version)
- `k8s.io/client-go` (`44145f04b68cf362d9c4df2182967c2275eaefed`)

In #353 (add Mesos provider, 20 Jul 2016), the `golang/glog` hash is `fca8c8854093a154ff1eb580aae10276ad6b1b5f`.

The problem appear in #836 (use k8s client, 1 Dec 2016).

Refs:
- Traefik:
  - https://github.com/containous/traefik/pull/836
  - 131f581f77
- Glog
  - https://github.com/golang/glog/commits/master
  - https://github.com/golang/glog/pull/13
  - 44145f04b6
  - fca8c88540
- k8s
  - e121606b0d/Godeps/Godeps.json
  - https://github.com/kubernetes/client-go/blob/master/Godeps/Godeps.json

glide.lock

@@ -226,7 +226,7 @@ imports:
   - proto
   - sortkeys
 - name: github.com/golang/glog
-  version: fca8c8854093a154ff1eb580aae10276ad6b1b5f
+  version: 44145f04b68cf362d9c4df2182967c2275eaefed
 - name: github.com/golang/protobuf
   version: 2bba0603135d7d7f5cb73b2125beeda19c09f4ef
   subpackages:

vendor/github.com/golang/glog/glog.go

@@ -676,10 +676,7 @@ func (l *loggingT) output(s severity, buf *buffer, file string, line int, alsoTo
 		}
 	}
 	data := buf.Bytes()
-	if !flag.Parsed() {
-		os.Stderr.Write([]byte("ERROR: logging before flag.Parse: "))
-		os.Stderr.Write(data)
-	} else if l.toStderr {
+	if l.toStderr {
 		os.Stderr.Write(data)
 	} else {
 		if alsoToStderr || l.alsoToStderr || s >= l.stderrThreshold.get() {