Reason for revert:
[Sheriff] gyp change breaks calling gyp on XP:
http://build.chromium.org/p/client.v8/builders/V8%20Win32%20-%201/builds/2849

Original issue's description:
> Update V8 DEPS.
>
> Rolling v8/build/gyp to fdcd8bc10c935eff13b391644b01460593c46861
>
> Rolling v8/tools/clang to 4cc9c6714533a07ba02ca01ed04557f055820532
>
> TBR=machenbach@chromium.org
>
> Committed: https://crrev.com/6e7e5e833c8bddf7d6a97cd3c01f0afe5a882bd6
> Cr-Commit-Position: refs/heads/master@{#29059}

TBR=v8-autoroll@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1180193003

Cr-Commit-Position: refs/heads/master@{#29060}