Optimize Float32x4Array, Float64x2Array and Int32x4Array element loading
and storing for ia32 and x64 port by:
  1). Allocating SIMD128 registers
  2). Emitting SIMD movups instruction
  3). Adding deoptimization support for SIMD128 registers or stack slots

Conflicts:
	src/hydrogen-instructions.cc
	src/hydrogen-instructions.h
	src/ia32/assembler-ia32.h
	src/ia32/deoptimizer-ia32.cc
	src/ia32/lithium-codegen-ia32.cc
	src/ia32/lithium-codegen-ia32.h
	src/ia32/macro-assembler-ia32.cc
	src/x64/assembler-x64.h
	src/x64/lithium-codegen-x64.cc
	src/x64/lithium-x64.h