[release-branch.go1.15] go1.15.4

Change-Id: Ibcd61e2c7ef7cc6f8509dadea6c3952c5dd7016e
Reviewed-on: https://go-review.googlesource.com/c/go/+/267879
Run-TryBot: Alexander Rakoczy <alex@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Trust: Alexander Rakoczy <alex@golang.org>
diff --git a/VERSION b/VERSION
index 46b20ce..b0378bd 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-go1.15.3
\ No newline at end of file
+go1.15.4
\ No newline at end of file