Fix v8_current_cpu setting for CrOS builds after r410853.

Fix v8_current_cpu setting for CrOS builds after r410853.

In r410853 we changed how the GN toolchains move arguments around,
but we missed one reference to the v8_toolchain_cpu in the CrOS
toolchain definitions. This CL fixes that.

TBR=brettw@chromium.org, stevenjb@chromium.org
BUG=634446
Committed: https://crrev.com/72d6d06aef7e5284e20e30c685ec35557d9e38a7
Cr-Commit-Position: refs/heads/master@{#410933}

[Dirk Pranke, 2016-08-10 01:53:15]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2016-08-10 01:53:51]

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, 2016-08-10 03:02:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-10 03:04:38]

Description was changed from

==========
Fix v8_current_cpu setting for CrOS builds after r410853.

In r410853 we changed how the GN toolchains move arguments around,
but we missed one reference to the v8_toolchain_cpu in the CrOS
toolchain definitions. This CL fixes that.

TBR=brettw@chromium.org, stevenjb@chromium.org
BUG=634446
==========

to

==========
Fix v8_current_cpu setting for CrOS builds after r410853.

In r410853 we changed how the GN toolchains move arguments around,
but we missed one reference to the v8_toolchain_cpu in the CrOS
toolchain definitions. This CL fixes that.

TBR=brettw@chromium.org, stevenjb@chromium.org
BUG=634446

Committed: https://crrev.com/72d6d06aef7e5284e20e30c685ec35557d9e38a7
Cr-Commit-Position: refs/heads/master@{#410933}
==========

[commit-bot: I haz the power, 2016-08-10 03:04:39]

Patchset 1 (id:??) landed as
https://crrev.com/72d6d06aef7e5284e20e30c685ec35557d9e38a7
Cr-Commit-Position: refs/heads/master@{#410933}

[brettw, 2016-08-10 03:53:06]

lgtm