[release-branch.go1.9] go1.9.3

Change-Id: I9347a78c86dcc13cd5f6f000e788934cb1bda491
Reviewed-on: https://go-review.googlesource.com/89015
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 988b051..440c07e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-go1.9.2
\ No newline at end of file
+go1.9.3
\ No newline at end of file