Replace or exclude MMX intrinsics in yuv_convert_simd_x86 due to lack of VS2010 support for them in…

Replace or exclude MMX intrinsics in yuv_convert_simd_x86 due to lack of VS2010 support for them in Win64 

On Win64, exclude MMX version in ChooseFilterYUVRowsProc; still use faster 
SSE2 version. 
Replace _mm_empty() with new yasm that implements EmptyRegisterState_MMX() 
with emms in EmptyRegisterState(), ConvertYUVToRGB32_MMX(...), and 
ConvertYUVToRGB32_SSE(...). 

This patch does not fix other win64 media link errors; more work remains for 
bug 172938. 

Committing for wolenetz from : https://codereview.chromium.org/12082087/#msg15

BUG=172938, 166496
R=wolenetz@chromium.org
TBR=wolenetz@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=180141

[commit-bot: I haz the power, 2013-02-01 07:48:43]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jschuh@chromium.org/12090114/3001

[commit-bot: I haz the power, 2013-02-01 07:48:45]

Presubmit check for 12090114-3001 failed and returned exit status 1.


Running presubmit commit checks ...

** Presubmit Messages **
--tbr was specified, skipping OWNERS check

** Presubmit ERRORS **
Run the command: svn pset svn:eol-style LF \
  media/base/simd/empty_register_state_mmx.asm

[commit-bot: I haz the power, 2013-02-01 07:51:24]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jschuh@chromium.org/12090114/9001