Version 2.19.0-255.2.beta

* Cherry-pick 003ea967a56e0dd0e2744099c78a46fa5ddc6c57 to beta
diff --git a/tools/VERSION b/tools/VERSION
index 9047c02..2ccad33 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 19
 PATCH 0
 PRERELEASE 255
-PRERELEASE_PATCH 1
+PRERELEASE_PATCH 2