X87: Make disassembler string tables read-only.

port r24672.

original commit message:

  Move them from .data to .rodata.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/654263006

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24710 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
X87: Implement the new semantics for 'super(...)'

original commit message:

  Implement the new semantics for 'super(...)'

  Per the latest ES6 draft, super(...) translates into a call
   to function's prototype.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/642603006

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24711 ce2b1a6d-e550-0410-aec6-3dcde31c8c00