Reland of Flip Linux bots on chromium.lkgr to GN.

Reland of Flip Linux bots on chromium.lkgr to GN. (patchset #3 id:60001 of https://codereview.chromium.org/2054843002/ )

Reason for revert:
This might work now (see https://crbug.com/618702, which I forgot to mention in the revert message).

Original issue's description:
> Revert of Flip Linux bots on chromium.lkgr to GN. (patchset #3 id:40001 of https://codereview.chromium.org/2006173002/ )
>
> Reason for revert:
> This had no effect: The LKGR waterfall used to be not on recipes, and mb wasn't hooked up right and in gn mode wrote its output to out/None (and runhooks still ran gyp, so gyp's ninja files were always used).
>
> I've now switched most of the bots to recipes, and now gn does have an effect, and all the bots now fail to build 'cause they build "chromium_builder_asan", a target that doesn't exist in the gn build.
>
> Reverting to get back to a working state. I'll look at fixing and will hopefully reland this soon.
>
> Original issue's description:
> > Flip Linux bots on chromium.lkgr to GN.
> >
> > R=brettw@chromium.org, inferno@chromium.org
> > BUG=605732
> >
> > Committed: https://crrev.com/6864dbb0407a47f697901f70105d2c2c829c08bc
> > Cr-Commit-Position: refs/heads/master@{#398038}
>
> TBR=brettw@chromium.org,inferno@chromium.org,dpranke@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=605732
>
> Committed: https://crrev.com/424b728048335ebf880781b600f65fc7d993e206
> Cr-Commit-Position: refs/heads/master@{#398904}

TBR=brettw@chromium.org,inferno@chromium.org,dpranke@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=605732
Committed: https://crrev.com/e4e9b9ce3b7b6309477ac846f5ff8b565745fd75
Cr-Commit-Position: refs/heads/master@{#399261}

[Nico, 2016-06-10 19:08:21]

The CQ bit was checked by thakis@chromium.org

[Nico, 2016-06-10 19:08:21]

Created Reland of Flip Linux bots on chromium.lkgr to GN.

[commit-bot: I haz the power, 2016-06-10 19:08:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2057193003/1

[inferno, 2016-06-10 19:18:18]

lgtm

[Dirk Pranke, 2016-06-10 19:28:38]

lgtm also.

[commit-bot: I haz the power, 2016-06-10 20:19:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-10 20:19:13]

CQ bit was unchecked

[commit-bot: I haz the power, 2016-06-10 20:22:28]

Description was changed from

==========
Reland of Flip Linux bots on chromium.lkgr to GN. (patchset #3 id:60001 of
https://codereview.chromium.org/2054843002/ )

Reason for revert:
This might work now (see https://crbug.com/618702, which I forgot to mention in
the revert message).

Original issue's description:
> Revert of Flip Linux bots on chromium.lkgr to GN. (patchset #3 id:40001 of
https://codereview.chromium.org/2006173002/ )
> 
> Reason for revert:
> This had no effect: The LKGR waterfall used to be not on recipes, and mb
wasn't hooked up right and in gn mode wrote its output to out/None (and runhooks
still ran gyp, so gyp's ninja files were always used).
> 
> I've now switched most of the bots to recipes, and now gn does have an effect,
and all the bots now fail to build 'cause they build "chromium_builder_asan", a
target that doesn't exist in the gn build.
> 
> Reverting to get back to a working state. I'll look at fixing and will
hopefully reland this soon.
> 
> Original issue's description:
> > Flip Linux bots on chromium.lkgr to GN.
> >
> > R=brettw@chromium.org, inferno@chromium.org
> > BUG=605732
> >
> > Committed: https://crrev.com/6864dbb0407a47f697901f70105d2c2c829c08bc
> > Cr-Commit-Position: refs/heads/master@{#398038}
> 
> TBR=brettw@chromium.org,inferno@chromium.org,dpranke@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=605732
> 
> Committed: https://crrev.com/424b728048335ebf880781b600f65fc7d993e206
> Cr-Commit-Position: refs/heads/master@{#398904}

TBR=brettw@chromium.org,inferno@chromium.org,dpranke@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=605732
==========

to

==========
Reland of Flip Linux bots on chromium.lkgr to GN. (patchset #3 id:60001 of
https://codereview.chromium.org/2054843002/ )

Reason for revert:
This might work now (see https://crbug.com/618702, which I forgot to mention in
the revert message).

Original issue's description:
> Revert of Flip Linux bots on chromium.lkgr to GN. (patchset #3 id:40001 of
https://codereview.chromium.org/2006173002/ )
>
> Reason for revert:
> This had no effect: The LKGR waterfall used to be not on recipes, and mb
wasn't hooked up right and in gn mode wrote its output to out/None (and runhooks
still ran gyp, so gyp's ninja files were always used).
>
> I've now switched most of the bots to recipes, and now gn does have an effect,
and all the bots now fail to build 'cause they build "chromium_builder_asan", a
target that doesn't exist in the gn build.
>
> Reverting to get back to a working state. I'll look at fixing and will
hopefully reland this soon.
>
> Original issue's description:
> > Flip Linux bots on chromium.lkgr to GN.
> >
> > R=brettw@chromium.org, inferno@chromium.org
> > BUG=605732
> >
> > Committed: https://crrev.com/6864dbb0407a47f697901f70105d2c2c829c08bc
> > Cr-Commit-Position: refs/heads/master@{#398038}
>
> TBR=brettw@chromium.org,inferno@chromium.org,dpranke@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=605732
>
> Committed: https://crrev.com/424b728048335ebf880781b600f65fc7d993e206
> Cr-Commit-Position: refs/heads/master@{#398904}

TBR=brettw@chromium.org,inferno@chromium.org,dpranke@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=605732

Committed: https://crrev.com/e4e9b9ce3b7b6309477ac846f5ff8b565745fd75
Cr-Commit-Position: refs/heads/master@{#399261}
==========

[commit-bot: I haz the power, 2016-06-10 20:22:29]

Patchset 1 (id:??) landed as
https://crrev.com/e4e9b9ce3b7b6309477ac846f5ff8b565745fd75
Cr-Commit-Position: refs/heads/master@{#399261}

[Nico, 2016-06-13 09:08:40]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/2063673002/ by thakis@chromium.org.

The reason for reverting is: This breaks:

* UBSan vptr Release:
https://build.chromium.org/p/chromium.lkgr/builders/UBSan%20vptr%20Release/bu...
clang: error: argument unused during compilation: '-fsanitize-coverage=edge'
This is https://crbug.com/618534

* The 3 32-bit x86 with 32-bit arm v8 asan bots, e.g.
https://build.chromium.org/p/chromium.lkgr/builders/ASan%20Debug%20%2832-bit%...
../../v8/src/base/build_config.h:145:2: error: Target architecture ia32 is only
supported on ia32 host
#error Target architecture ia32 is only supported on ia32 host
 ^
I filed https://crbug.com/619503 for this..