Version 2.12.0-259.16.beta

* Cherry-pick 410f242ebc1efd81cf800ada54f5311e6f895c58 to beta
diff --git a/tools/VERSION b/tools/VERSION
index e0c8ab4..b9cbea1 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 12
 PATCH 0
 PRERELEASE 259
-PRERELEASE_PATCH 15
\ No newline at end of file
+PRERELEASE_PATCH 16
\ No newline at end of file