Fix arm compile problem on Lucid.

Fix arm compile problem on Lucid.

Patch from Jeff Bailey <jeffbailey@google.com>

These functions on ARM both are doing something weird where, when
optimization is not enable, there aren't enough low registers available for
the compiler to handle the asm.

My ARM-fu is pretty weak, so I have forced the functions to -O1, which
allows them to compile.  It would be reasonable to set them to O2 as I
expect anyone debugging this will just tweak it as appropriate.

The error that this is solving:

third_party/skia/src/opts/SkBitmapProcState_opts_arm.cpp: In function 'void
SI8_D16_nofilter_DX_arm(const SkBitmapProcState&, const uint32_t*, int,
uint16_t*)':
third_party/skia/src/opts/SkBitmapProcState_opts_arm.cpp:101:24: error:
can't find a register in class 'LO_REGS' while reloading 'asm'
third_party/skia/src/opts/SkBitmapProcState_opts_arm.cpp:101:24: error:
'asm' operand has impossible constraints

However, it has to be set on both functions, as after the first error is
cleared, it triggers a second time.

Review URL: http://codereview.appspot.com/4452044

git-svn-id: http://skia.googlecode.com/svn/trunk@1228 2bbb7eff-a529-9590-31e7-b0007b416f81