[release-branch.go1.13] go1.13rc1

Change-Id: I2921895d336c8f63e521b5c921494917b4f42f79
Reviewed-on: https://go-review.googlesource.com/c/go/+/191157
Run-TryBot: Andrew Bonventre <andybons@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..9cea2ad
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+go1.13rc1
\ No newline at end of file