Revert of GN(Android): Stop specifying depfile under outputs

Revert of GN(Android): Stop specifying depfile under outputs (patchset #2 id:20001 of https://codereview.chromium.org/2305283002/ )

Reason for revert:
Will update when fixed.

Original issue's description:
> GN(Android): Stop specifying depfile under outputs
> 
> Doing so is unnecessary (GN already knows that depfiles are generated by
> their target), and causes the unwanted side-effect of changes to .d
> files triggering rebuilds of dependent targets.
> 
> BUG=639042
> 
> Committed: https://crrev.com/fd47b4e4232b99dfb4044b79eea66a7e6b2c2a64
> Cr-Commit-Position: refs/heads/master@{#416710}

TBR=michaelbai@chromium.org,dpranke@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=639042

[agrieve, 2016-09-07 02:25:59]

Created Revert of GN(Android): Stop specifying depfile under outputs

[michaelbai, 2016-10-13 03:36:14]

On 2016/09/07 02:25:59, agrieve wrote:
> Created Revert of GN(Android): Stop specifying depfile under outputs

shall this be closed?

[agrieve, 2016-10-13 13:35:31]

On 2016/10/13 03:36:14, michaelbai wrote:
> On 2016/09/07 02:25:59, agrieve wrote:
> > Created Revert of GN(Android): Stop specifying depfile under outputs
> 
> shall this be closed?

closed.