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

And the 3 Mac build fixes. Fix conflicts in context_x86.* .

This reverts commits
  3d2c8e74c27efee58e24ec31441124f3f21384b9 ,
  34eda1dd66b92a361797c63d57fa19e83c08a1b4 ,
  f601d1954348b71186fa160a0ae6a1f4f1c5aee6 ,
  bc503348a1da573488503cc2819c9e30807bea31 .

Bug: 19150481
Change-Id: I6650ee30a7d261159380fe2119e14379e4dc9970
17 files changed