GN: Add Arm64 Linux support

GN: Add Arm64 Linux support

Add Arm64 linux support be able to build GN binary for
native arm64 builds.

R=dpranke@chromium.org, brettw@chromium.org

Committed: https://crrev.com/b9a43ab09791a1dcfd185141f71627c3b8d437db
Cr-Commit-Position: refs/heads/master@{#436256}

[Riku Voipio, 2016-12-02 13:43:51]

Add Arm64 linux support be able to build GN binary for native arm64 builds.

[Dirk Pranke, 2016-12-02 23:12:59]

lgtm

[Riku Voipio, 2016-12-05 09:57:40]

The CQ bit was checked by riku.voipio@linaro.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-05 09:58:04]

Dry run: 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, 2016-12-05 10:08:08]

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

[commit-bot: I haz the power, 2016-12-05 10:08:11]

Dry run: This issue passed the CQ dry run.

[Riku Voipio, 2016-12-05 10:40:23]

The CQ bit was checked by riku.voipio@linaro.org

[commit-bot: I haz the power, 2016-12-05 10:40:40]

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, 2016-12-05 10:44:23]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480934423746890, "parent_rev":
"251c42a9405ab87378d9c850fd5b95e9c1063531", "commit_rev":
"f229d6f37cddf9eae60fb44acbf9231ffff25293"}

[commit-bot: I haz the power, 2016-12-05 10:44:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-12-05 10:46:47]

Description was changed from

==========
GN: Add Arm64 Linux support

Add Arm64 linux support be able to build GN binary for
native arm64 builds.

R=dpranke@chromium.org, brettw@chromium.org
==========

to

==========
GN: Add Arm64 Linux support

Add Arm64 linux support be able to build GN binary for
native arm64 builds.

R=dpranke@chromium.org, brettw@chromium.org

Committed: https://crrev.com/b9a43ab09791a1dcfd185141f71627c3b8d437db
Cr-Commit-Position: refs/heads/master@{#436256}
==========

[commit-bot: I haz the power, 2016-12-05 10:46:47]

Patchset 1 (id:??) landed as
https://crrev.com/b9a43ab09791a1dcfd185141f71627c3b8d437db
Cr-Commit-Position: refs/heads/master@{#436256}

[brettw, 2016-12-06 00:26:16]

lgtm