Reland of Enable LLD for POSIX LTO builds on Linux.

Reland of Enable LLD for POSIX LTO builds on Linux. (patchset #1 id:1 of https://codereview.chromium.org/2900883002/ )

Reason for revert:
Fixes for breakpad bugs that broke crash reporting have landed: https://codereview.chromium.org/2906093002/

Original issue's description:
> Revert of Enable LLD for POSIX LTO builds on Linux. (patchset #1 id:1 of https://codereview.chromium.org/2877913003/ )
> 
> Reason for revert:
> Breaks crash reporting.
> 
> BUG=716484
> 
> Original issue's description:
> > Enable LLD for POSIX LTO builds on Linux.
> > 
> > This is a stripped down version of (reverted)
> > change: https://codereview.chromium.org/2831213006/
> > 
> > That change was reverted because ThinLTO regresses the binary
> > size too much. LLD was a harmless part of the change,
> > so it's worth enabling it.
> > 
> > Based on https://codereview.chromium.org/2844883002/ by
> > krasin@chromium.org, who is no longer with Google.
> > 
> > BUG=607968
> > R=dpranke@chromium.org,thakis@chromium.org
> > 
> > Review-Url: https://codereview.chromium.org/2877913003
> > Cr-Commit-Position: refs/heads/master@{#471532}
> > Committed: https://chromium.googlesource.com/chromium/src/+/e6a66337552cfd9a9af9471775ad5b67ee588b88
> 
> TBR=dpranke@chromium.org,thakis@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=607968
> 
> Review-Url: https://codereview.chromium.org/2900883002
> Cr-Commit-Position: refs/heads/master@{#473733}
> Committed: https://chromium.googlesource.com/chromium/src/+/579f0a9f7b3a6428db7ae8aa457fd197ac325fe9

TBR=dpranke@chromium.org,thakis@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=716484
Review-Url: https://codereview.chromium.org/2909713002
Cr-Commit-Position: refs/heads/master@{#475155}
Committed: https://chromium.googlesource.com/chromium/src/+/87e965ee819215cdcdd88eb26fb824194a04cd9a

[pcc1, 2017-05-26 20:29:40]

The CQ bit was checked by pcc@chromium.org

[pcc1, 2017-05-26 20:29:40]

Created Reland of Enable LLD for POSIX LTO builds on Linux.

[commit-bot: I haz the power, 2017-05-26 20:30:35]

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, 2017-05-26 22:04:54]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1495830580305580, "parent_rev":
"189dd02cbb3d5187ee70e67d51a09f6d274d3a6a", "commit_rev":
"87e965ee819215cdcdd88eb26fb824194a04cd9a"}

[commit-bot: I haz the power, 2017-05-26 22:05:02]

Description was changed from

==========
Reland of Enable LLD for POSIX LTO builds on Linux. (patchset #1 id:1 of
https://codereview.chromium.org/2900883002/ )

Reason for revert:
Fixes for breakpad bugs that broke crash reporting have landed:
https://codereview.chromium.org/2906093002/

Original issue's description:
> Revert of Enable LLD for POSIX LTO builds on Linux. (patchset #1 id:1 of
https://codereview.chromium.org/2877913003/ )
> 
> Reason for revert:
> Breaks crash reporting.
> 
> BUG=716484
> 
> Original issue's description:
> > Enable LLD for POSIX LTO builds on Linux.
> > 
> > This is a stripped down version of (reverted)
> > change: https://codereview.chromium.org/2831213006/
> > 
> > That change was reverted because ThinLTO regresses the binary
> > size too much. LLD was a harmless part of the change,
> > so it's worth enabling it.
> > 
> > Based on https://codereview.chromium.org/2844883002/ by
> > krasin@chromium.org, who is no longer with Google.
> > 
> > BUG=607968
> > R=dpranke@chromium.org,thakis@chromium.org
> > 
> > Review-Url: https://codereview.chromium.org/2877913003
> > Cr-Commit-Position: refs/heads/master@{#471532}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/e6a66337552cfd9a9af9471775ad...
> 
> TBR=dpranke@chromium.org,thakis@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=607968
> 
> Review-Url: https://codereview.chromium.org/2900883002
> Cr-Commit-Position: refs/heads/master@{#473733}
> Committed:
https://chromium.googlesource.com/chromium/src/+/579f0a9f7b3a6428db7ae8aa457f...

TBR=dpranke@chromium.org,thakis@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=716484
==========

to

==========
Reland of Enable LLD for POSIX LTO builds on Linux. (patchset #1 id:1 of
https://codereview.chromium.org/2900883002/ )

Reason for revert:
Fixes for breakpad bugs that broke crash reporting have landed:
https://codereview.chromium.org/2906093002/

Original issue's description:
> Revert of Enable LLD for POSIX LTO builds on Linux. (patchset #1 id:1 of
https://codereview.chromium.org/2877913003/ )
> 
> Reason for revert:
> Breaks crash reporting.
> 
> BUG=716484
> 
> Original issue's description:
> > Enable LLD for POSIX LTO builds on Linux.
> > 
> > This is a stripped down version of (reverted)
> > change: https://codereview.chromium.org/2831213006/
> > 
> > That change was reverted because ThinLTO regresses the binary
> > size too much. LLD was a harmless part of the change,
> > so it's worth enabling it.
> > 
> > Based on https://codereview.chromium.org/2844883002/ by
> > krasin@chromium.org, who is no longer with Google.
> > 
> > BUG=607968
> > R=dpranke@chromium.org,thakis@chromium.org
> > 
> > Review-Url: https://codereview.chromium.org/2877913003
> > Cr-Commit-Position: refs/heads/master@{#471532}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/e6a66337552cfd9a9af9471775ad...
> 
> TBR=dpranke@chromium.org,thakis@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=607968
> 
> Review-Url: https://codereview.chromium.org/2900883002
> Cr-Commit-Position: refs/heads/master@{#473733}
> Committed:
https://chromium.googlesource.com/chromium/src/+/579f0a9f7b3a6428db7ae8aa457f...

TBR=dpranke@chromium.org,thakis@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=716484

Review-Url: https://codereview.chromium.org/2909713002
Cr-Commit-Position: refs/heads/master@{#475155}
Committed:
https://chromium.googlesource.com/chromium/src/+/87e965ee819215cdcdd88eb26fb8...
==========

[commit-bot: I haz the power, 2017-05-26 22:05:03]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/87e965ee819215cdcdd88eb26fb8...

[Dirk Pranke, 2017-05-31 00:07:03]

lgtm