X87: Minor-key-ify four stubs.

port r23605.

orginal commit message:
  - Minor-key-ify four stubs.
  - ICCompareStub
  - BinaryOpICStub
  - CompareNilICStub - VectorLoadStub

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/534883002

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23628 ce2b1a6d-e550-0410-aec6-3dcde31c8c00