port 9be015a2 (r37854)

  original commit message:
  Calling Runtime::kAbort through a builtin instead of the c-entry stub
  will allow to generate the call in a background thread, because a
  builtin provides its own handle, whereas a code stub does not.

  @v8-mips-ports: Could you take a special look at the padding that is
  done in MacroAssembler::Abort()?

BUG=

Review-Url: https://codereview.chromium.org/2166703002
Cr-Commit-Position: refs/heads/master@{#37880}