Add shared --disableExplicitAlloc flag to tools

Unfortunately, this seems like the best way to have a local bot that uses the old-style allocation.

Change-Id: I3124d04bdbd2b262867a620fa467de86fec42d8f
Reviewed-on: https://skia-review.googlesource.com/145680
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
2 files changed