Also fixing DEPS include rules for heap-write-barrier.h

BUG=v8:5402,v8:8015

Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ia785da321bc6c6f4c375ae8c866a0bf294e64f5b
Reviewed-on: https://chromium-review.googlesource.com/1238453Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56138}