Modify the NaCL GN toolchains to force component build off.

Modify the NaCL GN toolchains to force component build off.

Since the NaCl toolchains don't actually support shared libraries,
we force the GN toolchain definitions to turn is_component_build
off, so that regardless of the user's settings for non-NaCl toolchains,
things will build correctly.

R=bbudge@chromium.org, brettw@chromium.org
BUG=482415
Committed: https://chromium.googlesource.com/native_client/src/native_client/+/301048e09664d30719af473361a1d735fb840393

[brettw, 2015-05-01 01:09:43]

lgtm

[Dirk Pranke, 2015-05-01 01:17:28]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2015-05-01 01:17:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1121643002/1

[commit-bot: I haz the power, 2015-05-01 01:17:56]

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

[commit-bot: I haz the power, 2015-05-01 01:17:57]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Dirk Pranke, 2015-05-01 01:18:57]

The CQ bit was checked by dpranke@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-05-01 01:19:16]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1121643002/1

[commit-bot: I haz the power, 2015-05-01 01:19:17]

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

[commit-bot: I haz the power, 2015-05-01 01:19:19]

Dry run: No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[bbudge, 2015-05-01 21:33:30]

lgtm

[Dirk Pranke, 2015-05-01 21:51:01]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2015-05-01 21:51:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1121643002/1

[commit-bot: I haz the power, 2015-05-01 22:53:34]

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

[commit-bot: I haz the power, 2015-05-01 22:53:35]

Try jobs failed on following builders:
  nacl-precise_64-newlib-arm_qemu-pnacl on tryserver.nacl (JOB_FAILED,
http://build.chromium.org/p/tryserver.nacl/builders/nacl-precise_64-newlib-ar...)

[Dirk Pranke, 2015-05-05 20:34:59]

Committed patchset #1 (id:1) manually as
301048e09664d30719af473361a1d735fb840393 (presubmit successful).