Reland of Update the nacl_bootstrap GN code to work in ChromeOS chroot builds.

Reland of Update the nacl_bootstrap GN code to work in ChromeOS chroot builds. (patchset #1 id:1 of https://codereview.chromium.org/2188303002/ )

Reason for revert:
re-reverting (i.e., relanding), since we're not sure this'll actually fix things.

Original issue's description:
> Revert of Update the nacl_bootstrap GN code to work in ChromeOS chroot builds. (patchset #2 id:20001 of https://codereview.chromium.org/2085683004/ )
> 
> Reason for revert:
> It looks like this breaks CrOS ARM builds; see crbug.com/629593 .
> 
> Original issue's description:
> > Update the nacl_bootstrap GN code to work in ChromeOS chroot builds.
> > 
> > In ChromeOS chroot builds, they use their own compiler toolchain
> > and set a bunch of target flags, and the prior version of the
> > nacl_bootstrap_* toolchains weren't picking them up properly.
> > 
> > This CL switches to use the new //build/toolchain/cros:nacl_bootstrap
> > toolchain that mimics the //build/toolchain/cros:target toolchain and uses
> > all of the same settings except that it forces off use_debug_fission
> > and use_gold.
> > 
> > R=mcgrathr@chromium.org, llozano@chromium.org, bradnelson@chromium.org
> > BUG=621686
> > 
> > Committed: https://chromium.googlesource.com/native_client/src/native_client/+/0949e1bef9d6b25ee44eb69a54e0cc6f8a677375
> 
> TBR=llozano@chromium.org,mcgrathr@chromium.org,bradnelson@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=621686
> 
> Committed: https://chromium.googlesource.com/native_client/src/native_client/+/a07450d163bfb18a469db4e630a632f2f206c9cf

TBR=llozano@chromium.org,mcgrathr@chromium.org,bradnelson@chromium.org,llozano@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=621686
Committed: https://chromium.googlesource.com/native_client/src/native_client/+/5e296cb4749c3b48653eb6e5888947ad4aa86d3a

[Dirk Pranke, 2016-07-28 21:35:47]

The CQ bit was checked by dpranke@chromium.org

[Dirk Pranke, 2016-07-28 21:35:47]

Created Reland of Update the nacl_bootstrap GN code to work in ChromeOS chroot
builds.

[commit-bot: I haz the power, 2016-07-28 21:35:51]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-28 21:35:52]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-07-28 21:35:53]

No L-G-T-M from a valid reviewer yet. 
CQ run can only be started by full committers or once the patch has
received an L-G-T-M from a full committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
Committers are members of the group "project-nacl-committers".
Note that this has nothing to do with OWNERS files.

[Roland McGrath, 2016-07-28 21:37:52]

lgtm

[Dirk Pranke, 2016-07-28 21:39:38]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2016-07-28 21:39:41]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-28 21:39:48]

Description was changed from

==========
Reland of Update the nacl_bootstrap GN code to work in ChromeOS chroot builds.
(patchset #1 id:1 of https://codereview.chromium.org/2188303002/ )

Reason for revert:
re-reverting (i.e., relanding), since we're not sure this'll actually fix
things.

Original issue's description:
> Revert of Update the nacl_bootstrap GN code to work in ChromeOS chroot builds.
(patchset #2 id:20001 of https://codereview.chromium.org/2085683004/ )
> 
> Reason for revert:
> It looks like this breaks CrOS ARM builds; see crbug.com/629593 .
> 
> Original issue's description:
> > Update the nacl_bootstrap GN code to work in ChromeOS chroot builds.
> > 
> > In ChromeOS chroot builds, they use their own compiler toolchain
> > and set a bunch of target flags, and the prior version of the
> > nacl_bootstrap_* toolchains weren't picking them up properly.
> > 
> > This CL switches to use the new //build/toolchain/cros:nacl_bootstrap
> > toolchain that mimics the //build/toolchain/cros:target toolchain and uses
> > all of the same settings except that it forces off use_debug_fission
> > and use_gold.
> > 
> > R=mcgrathr@chromium.org, llozano@chromium.org, bradnelson@chromium.org
> > BUG=621686
> > 
> > Committed:
https://chromium.googlesource.com/native_client/src/native_client/+/0949e1bef...
> 
> TBR=llozano@chromium.org,mcgrathr@chromium.org,bradnelson@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=621686
> 
> Committed:
https://chromium.googlesource.com/native_client/src/native_client/+/a07450d16...

TBR=llozano@chromium.org,mcgrathr@chromium.org,bradnelson@chromium.org,llozan...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=621686
==========

to

==========
Reland of Update the nacl_bootstrap GN code to work in ChromeOS chroot builds.
(patchset #1 id:1 of https://codereview.chromium.org/2188303002/ )

Reason for revert:
re-reverting (i.e., relanding), since we're not sure this'll actually fix
things.

Original issue's description:
> Revert of Update the nacl_bootstrap GN code to work in ChromeOS chroot builds.
(patchset #2 id:20001 of https://codereview.chromium.org/2085683004/ )
> 
> Reason for revert:
> It looks like this breaks CrOS ARM builds; see crbug.com/629593 .
> 
> Original issue's description:
> > Update the nacl_bootstrap GN code to work in ChromeOS chroot builds.
> > 
> > In ChromeOS chroot builds, they use their own compiler toolchain
> > and set a bunch of target flags, and the prior version of the
> > nacl_bootstrap_* toolchains weren't picking them up properly.
> > 
> > This CL switches to use the new //build/toolchain/cros:nacl_bootstrap
> > toolchain that mimics the //build/toolchain/cros:target toolchain and uses
> > all of the same settings except that it forces off use_debug_fission
> > and use_gold.
> > 
> > R=mcgrathr@chromium.org, llozano@chromium.org, bradnelson@chromium.org
> > BUG=621686
> > 
> > Committed:
https://chromium.googlesource.com/native_client/src/native_client/+/0949e1bef...
> 
> TBR=llozano@chromium.org,mcgrathr@chromium.org,bradnelson@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=621686
> 
> Committed:
https://chromium.googlesource.com/native_client/src/native_client/+/a07450d16...

TBR=llozano@chromium.org,mcgrathr@chromium.org,bradnelson@chromium.org,llozan...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=621686

Committed:
https://chromium.googlesource.com/native_client/src/native_client/+/5e296cb47...
==========

[commit-bot: I haz the power, 2016-07-28 21:39:49]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/native_client/src/native_client/+/5e296cb47...