Use the latest depot_tools

dbbf350a34ab7991e635f91a70bd2d211eb921be
2018-03-26 14:32:44 +03:00 · 2018-03-26 14:32:44 +03:00 · dec7ebbbc0
--- a/vendor/depot_tools
+++ b/vendor/depot_tools
@ -1 +1 @@
-Subproject commit ad64abd69aedabe7da5db9ca6de6fd28fca879d2
+Subproject commit dbbf350a34ab7991e635f91a70bd2d211eb921be