[gn] Fix config for using clang

[gn] Fix config for using clang

Needed for https://codereview.chromium.org/2124263002/

BUG=chromium:474921
TBR=jochen@chromium.org, vogelheim@chromium.org,
NOTRY=true

Committed: https://crrev.com/03453d10be08a04ce99be1836cf91eee8ba9eca6
Cr-Commit-Position: refs/heads/master@{#37574}

[Michael Achenbach, 2016-07-07 08:58:02]

Description was changed from

==========
[gn] Fix config for using clang

BUG=
==========

to

==========
[gn] Fix config for using clang

Needed for https://codereview.chromium.org/2124263002/

BUG=chromium:474921
TBR=jochen@chromium.org, vogelheim@chromium.org, 
NOTRY=true
==========

[Michael Achenbach, 2016-07-07 08:58:02]

machenbach@chromium.org changed reviewers:
+ jochen@chromium.org, vogelheim@chromium.org

[Michael Achenbach, 2016-07-07 08:59:18]

TBR - the correct arg is is_clang. There are probably a few more like this.

Without it the comparison step shows that clang would be used on a gcc bot if we
switched to gn:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20gcc%204.8/builds...

[Michael Achenbach, 2016-07-07 09:00:26]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2016-07-07 09:00:30]

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, 2016-07-07 09:02:43]

Description was changed from

==========
[gn] Fix config for using clang

Needed for https://codereview.chromium.org/2124263002/

BUG=chromium:474921
TBR=jochen@chromium.org, vogelheim@chromium.org, 
NOTRY=true
==========

to

==========
[gn] Fix config for using clang

Needed for https://codereview.chromium.org/2124263002/

BUG=chromium:474921
TBR=jochen@chromium.org, vogelheim@chromium.org, 
NOTRY=true
==========

[commit-bot: I haz the power, 2016-07-07 09:02:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-07 09:05:03]

Description was changed from

==========
[gn] Fix config for using clang

Needed for https://codereview.chromium.org/2124263002/

BUG=chromium:474921
TBR=jochen@chromium.org, vogelheim@chromium.org, 
NOTRY=true
==========

to

==========
[gn] Fix config for using clang

Needed for https://codereview.chromium.org/2124263002/

BUG=chromium:474921
TBR=jochen@chromium.org, vogelheim@chromium.org,
NOTRY=true

Committed: https://crrev.com/03453d10be08a04ce99be1836cf91eee8ba9eca6
Cr-Commit-Position: refs/heads/master@{#37574}
==========

[commit-bot: I haz the power, 2016-07-07 09:05:04]

Patchset 1 (id:??) landed as
https://crrev.com/03453d10be08a04ce99be1836cf91eee8ba9eca6
Cr-Commit-Position: refs/heads/master@{#37574}

[vogelheim, 2016-07-07 10:59:30]

lgtm