Reapply r922 with the dependencies reversed.

Reapply r922 with the dependencies reversed.

r922 made sure that the flattened set of dependencies for a given target
were themselves in pre-flattening dependency order.  It regressed build
performance.  As an experiment to help judge why, reapply r922 with the
list reversed.

Committed: http://code.google.com/p/gyp/source/detail?r=932

[Evan Martin, 2011-06-03 16:30:54]

I intend to land this, update Chrome, see how the buildbots react, and then
either revert or adjust this as necessary.

[Mark Mentovai, 2011-06-03 16:42:25]

LGTM for experimentation. Don’t leave this as-is for too long.

[Yuki Shiino, 2011-06-03 18:28:17]

LGTM, too.

Thanks for taking care of this issue.