Use the istio standard (no v) for fortio tag (istio#1138)

```release-note NONE ``` Former-commit-id: 7c56322
munnerz · Oct 19, 2017 · c2bd1ea · c2bd1ea
1 parent 8a1ed0c
commit c2bd1ea
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/WORKSPACE b/WORKSPACE
@@ -75,7 +75,7 @@ go_repository(
 
 go_repository(
     name = "io_istio_fortio",
-    commit = "v0.2.8",
+    commit = "0.2.8",
     importpath = "istio.io/fortio",
 )