IA32: Small assembler tweak for divsd->mulsd sequence

Review URL: https://chromiumcodereview.appspot.com/13447003

Patch from Zheng Liu <zheng.z.liu@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14225 ce2b1a6d-e550-0410-aec6-3dcde31c8c00