[release-branch.go1.12-security] go1.12.8

Change-Id: I131f93770f9bc5f2d4ee73f158607c1c9e1550bb
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/527000
Reviewed-by: Filippo Valsorda <valsorda@google.com>

VERSION

diff --git a/VERSION b/VERSION
index 2ac7903..a62d1ea 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-go1.12.7
\ No newline at end of file
+go1.12.8
\ No newline at end of file