[release-branch.go1.15] go1.15rc1

Change-Id: I660c4655dfa0914dbe09a68921e102d06d9a2ed1
Reviewed-on: https://go-review.googlesource.com/c/go/+/244761
Run-TryBot: Alexander Rakoczy <alex@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..7d5ba4c
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+go1.15rc1
\ No newline at end of file