Revert of ARM Skia NEON patches - 12 - S32_Blend

Revert of ARM Skia NEON patches - 12 - S32_Blend (https://codereview.chromium.org/158973002/)

Reason for revert:
Breaking the build.

See http://108.170.219.164:10117/builders/Build-Ubuntu12-GCC-Arm7-Debug-Nexus4/builds/2966 (and others).

We are getting warnings that vsrc and vdst may be uninitialized. Please fix and resubmit.

Original issue's description:
> ARM Skia NEON patches - 12 - S32_Blend
> 
> Blitrow32: S32_Blend fix and little speed improvement
> 
> - the results are now exactly similar as the C code
> - the speed has improved, especially for small values of count
> 
> +-------+-----------+------------+
> | count | Cortex-A9 | Cortex-A15 |
> +-------+-----------+------------+
> | 1     | +30%      | +18%       |
> +-------+-----------+------------+
> | 2     | 0         | 0          |
> +-------+-----------+------------+
> | 4     | - <1%     | +14%       |
> +-------+-----------+------------+
> | > 4   | -0.5..+5% | -0.5..+4%  |
> +-------+-----------+------------+
> 
> Signed-off-by: Kévin PETIT <kevin.petit@arm.com>;
> 
> BUG=skia:
> 
> Committed: http://code.google.com/p/skia/source/detail?r=13532

TBR=djsollen@google.com,mtklein@google.com,kevin.petit@arm.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed: http://code.google.com/p/skia/source/detail?r=13534

[scroggo, 2014-02-21 17:52:08]

Created Revert of ARM Skia NEON patches - 12 - S32_Blend

[commit-bot: I haz the power, 2014-02-21 17:52:14]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/scroggo@google.com/175433002/1

[commit-bot: I haz the power, 2014-02-21 17:52:20]

Change committed as 13534