Calculate proper receiver map for monomorphic transitioning ICs.
This fixes a regression caused by
https://chromiumcodereview.appspot.com/11953025/

Review URL: https://chromiumcodereview.appspot.com/12217131

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13644 ce2b1a6d-e550-0410-aec6-3dcde31c8c00