Version 2.12.0-259.9.beta

* Cherry-pick 5bfeed21c1af642d97d0ff5f8d9ba47d3af1181e to beta
diff --git a/tools/VERSION b/tools/VERSION
index 5e91b59..58e23d3 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 12
 PATCH 0
 PRERELEASE 259
-PRERELEASE_PATCH 8
\ No newline at end of file
+PRERELEASE_PATCH 9
\ No newline at end of file