Revert r19394 - "Revert r18390 - "Roll gyp 1685:1806""

Also include a gyp_v8.py wrapper for new import rules.

> Doesn't work with python2.7 - I tested with 2.6 :-/
>
> BUG=none
> TBR=hpayer@chromium.org
> LOG=n

BUG=none
LOG=n
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/120763003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18433 ce2b1a6d-e550-0410-aec6-3dcde31c8c00