Use the initial map of the Object function for empty object literals

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/586673002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24088 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
X87: Implement loads and calls from 'super'.

port r24078.

orginal commit message:
   Implement loads and calls from 'super'

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/581273007

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24089 ce2b1a6d-e550-0410-aec6-3dcde31c8c00