Add gnu.build.id to shared libraries in GN.

Add gnu.build.id to shared libraries in GN.

We were doing this in gyp builds but not GN; add this in the GN config
too so that we can be sure crash symbols match.

BUG=594975
R=agrieve@chromium.org

Review URL: https://codereview.chromium.org/1801073002 .

Cr-Commit-Position: refs/heads/master@{#381242}
(cherry picked from commit e67cbae553e592e7683aefc74c775f1e4a99296a)

Committed: https://chromium.googlesource.com/chromium/src/+/d4c1f36bc7c8ec64fbc0507176fc3ce51adf38d1

[Torne, 2016-03-15 18:27:41]

Description was changed from

==========
Add gnu.build.id to shared libraries in GN.

We were doing this in gyp builds but not GN; add this in the GN config
too so that we can be sure crash symbols match.

BUG=594975
R=agrieve@chromium.org

Review URL: https://codereview.chromium.org/1801073002 .

Cr-Commit-Position: refs/heads/master@{#381242}
(cherry picked from commit e67cbae553e592e7683aefc74c775f1e4a99296a)
==========

to

==========
Add gnu.build.id to shared libraries in GN.

We were doing this in gyp builds but not GN; add this in the GN config
too so that we can be sure crash symbols match.

BUG=594975
R=agrieve@chromium.org

Review URL: https://codereview.chromium.org/1801073002 .

Cr-Commit-Position: refs/heads/master@{#381242}
(cherry picked from commit e67cbae553e592e7683aefc74c775f1e4a99296a)

Committed:
https://chromium.googlesource.com/chromium/src/+/d4c1f36bc7c8ec64fbc0507176fc...
==========

[Torne, 2016-03-15 18:27:43]

Committed patchset #1 (id:1) manually as
d4c1f36bc7c8ec64fbc0507176fc3ce51adf38d1.