[release-branch.go1.8] go1.8.6

Change-Id: I0aeac01cb7a4329129351d3175f11a0a50b7466c
Reviewed-on: https://go-review.googlesource.com/89195
Run-TryBot: Andrew Bonventre <andybons@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>

VERSION

diff --git a/VERSION b/VERSION
index d6b3513..6a2a740 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-go1.8.5
\ No newline at end of file
+go1.8.6
\ No newline at end of file