Small changes to get things building and running on Linux/ARM.

Small changes to get things building and running on Linux/ARM.

ninja -C out/Debug works, and I tested out/Debug/dm --nogpu (no X yet).

The only problems encountered were:
  - Like CrOS, I also needed to use the default float ABI (presumably hard).
  - The strings in GrBinHashKeyTest weren't necessarily 4-byte aligned.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/19996eda62181982d35c36e29515c1fe9c9fb2a3

[mtklein_C, 2014-11-21 03:57:38]

The CQ bit was checked by mtklein@chromium.org

[commit-bot: I haz the power, 2014-11-21 03:58:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/746043002/1

[commit-bot: I haz the power, 2014-11-21 03:58:45]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2014-11-21 09:58 UTC

[mtklein_C, 2014-11-21 03:59:08]

mtklein@chromium.org changed reviewers:
+ bsalomon@google.com, reed@google.com

[commit-bot: I haz the power, 2014-11-21 08:00:11]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2014-11-21 14:00 UTC

[commit-bot: I haz the power, 2014-11-21 14:00:16]

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

[commit-bot: I haz the power, 2014-11-21 14:00:17]

No LGTM from a valid reviewer yet. Please ask for an LGTM from a
full Skia committer from
https://skia.googlesource.com/skia/+/master/CQ_COMMITTERS

[bsalomon, 2014-11-21 14:42:53]

On 2014/11/21 14:00:17, I haz the power (commit-bot) wrote:
> No LGTM from a valid reviewer yet. Please ask for an LGTM from a
> full Skia committer from
> https://skia.googlesource.com/skia/+/master/CQ_COMMITTERS

We're almost ready to kill GrBinHashKey, but for the time being it lgtm.

[mtklein, 2014-11-21 14:48:14]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-11-21 14:48:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/746043002/1

[commit-bot: I haz the power, 2014-11-21 14:48:52]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/19996eda62181982d35c36e29515c1fe9c9fb2a3