ART: Implement X86 hard float (Quick/JNI/Baseline)

Use XMM0-XMM3 as parameter registers for float/double on X86.  X86_64
already uses XMM0-XMM7 for parameters.

Change the 'hidden' argument register from XMM0 to XMM7 to avoid a
conflict.

Add support for FPR save/restore in runtime/arch/x86.

Minimal support for Optimizing baseline compiler.

Bump the version in runtime/oat.h because this is an ABI change.

Change-Id: Ia6fe150e8488b9e582b0178c0dda65fc81d5a8ba
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>