Revert of CQ: Remove Linux ARM64 Debug trybot from default set.

Revert of CQ: Remove Linux ARM64 Debug trybot from default set. (patchset #1 id:1 of https://codereview.webrtc.org/2790263003/ )

Reason for revert:
The build config is now working again.

Original issue's description:
> CQ: Remove Linux ARM64 Debug trybot from default set.
> 
> It appears recent changes in Chromium (crbug.com/708104) is causing
> this to fail.
> Need to disable this to unblock rolling.
> 
> BUG=webrtc:7024
> TBR=oprypin@webrtc.org
> 
> Review-Url: https://codereview.webrtc.org/2790263003 .
> Cr-Commit-Position: refs/heads/master@{#17521}
> Committed: https://chromium.googlesource.com/external/webrtc/+/5115645c01e15a590bca43487552a8d8da83d611

TBR=oprypin@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7024
Review-Url: https://codereview.webrtc.org/2805603003
Cr-Commit-Position: refs/heads/master@{#17560}
Committed: https://chromium.googlesource.com/external/webrtc/+/be77920021bfe93746bdb204ef05d2eb29372fb2

[kjellander_webrtc, 2017-04-06 09:20:14]

The CQ bit was checked by kjellander@webrtc.org

[kjellander_webrtc, 2017-04-06 09:20:14]

Created Revert of CQ: Remove Linux ARM64 Debug trybot from default set.

[commit-bot: I haz the power, 2017-04-06 09:20:24]

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

[oprypin_webrtc, 2017-04-06 09:25:22]

Weren't you saying something that we cannot maintain this config until chromium
supports it?

[kjellander_webrtc, 2017-04-06 09:33:52]

On 2017/04/06 09:25:22, oprypin_webrtc wrote:
> Weren't you saying something that we cannot maintain this config until
chromium
> supports it?

Yes, but it's also good to readd it for now when it's green and the auto-rolling
is unblocked. That way we'll get short blame list when it breaks next time. 
I asked sbc@ in https://bugs.chromium.org/p/chromium/issues/detail?id=708104
about this.

[oprypin_webrtc, 2017-04-06 09:37:31]

On 2017/04/06 09:33:52, kjellander_webrtc wrote:
> On 2017/04/06 09:25:22, oprypin_webrtc wrote:
> > Weren't you saying something that we cannot maintain this config until
> chromium
> > supports it?
> 
> Yes, but it's also good to readd it for now when it's green and the
auto-rolling
> is unblocked. That way we'll get short blame list when it breaks next time. 
> I asked sbc@ in https://bugs.chromium.org/p/chromium/issues/detail?id=708104
> about this.

lgtm

[commit-bot: I haz the power, 2017-04-06 10:07:02]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1491470414069130, "parent_rev":
"24180017d51d5719a99502f9d2cbf24c41118d42", "commit_rev":
"be77920021bfe93746bdb204ef05d2eb29372fb2"}

[commit-bot: I haz the power, 2017-04-06 10:07:05]

Description was changed from

==========
Revert of CQ: Remove Linux ARM64 Debug trybot from default set. (patchset #1
id:1 of https://codereview.webrtc.org/2790263003/ )

Reason for revert:
The build config is now working again.

Original issue's description:
> CQ: Remove Linux ARM64 Debug trybot from default set.
> 
> It appears recent changes in Chromium (crbug.com/708104) is causing
> this to fail.
> Need to disable this to unblock rolling.
> 
> BUG=webrtc:7024
> TBR=oprypin@webrtc.org
> 
> Review-Url: https://codereview.webrtc.org/2790263003 .
> Cr-Commit-Position: refs/heads/master@{#17521}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/5115645c01e15a590bca43487...

TBR=oprypin@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7024
==========

to

==========
Revert of CQ: Remove Linux ARM64 Debug trybot from default set. (patchset #1
id:1 of https://codereview.webrtc.org/2790263003/ )

Reason for revert:
The build config is now working again.

Original issue's description:
> CQ: Remove Linux ARM64 Debug trybot from default set.
> 
> It appears recent changes in Chromium (crbug.com/708104) is causing
> this to fail.
> Need to disable this to unblock rolling.
> 
> BUG=webrtc:7024
> TBR=oprypin@webrtc.org
> 
> Review-Url: https://codereview.webrtc.org/2790263003 .
> Cr-Commit-Position: refs/heads/master@{#17521}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/5115645c01e15a590bca43487...

TBR=oprypin@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7024

Review-Url: https://codereview.webrtc.org/2805603003
Cr-Commit-Position: refs/heads/master@{#17560}
Committed:
https://chromium.googlesource.com/external/webrtc/+/be77920021bfe93746bdb204e...
==========

[commit-bot: I haz the power, 2017-04-06 10:07:06]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/be77920021bfe93746bdb204e...