[DynInst_API:] [dyninst/dyninst] e25489: Implement doNotOverflow for ARMv8.

["Sasha @leela" <sasha@xxxxxxxxxxx>]

  Branch: refs/heads/ARMv8
  Home:   https://github.com/dyninst/dyninst
  Commit: e254897dea0685bef77710882c770466b65eaab4
      https://github.com/dyninst/dyninst/commit/e254897dea0685bef77710882c770466b65eaab4
  Author: Sasha @leela <sasha@xxxxxxxxxxx>
  Date:   2018-10-30 (Tue, 30 Oct 2018)

  Changed paths:
    M dyninstAPI/src/emit-aarch64.C
    M dyninstAPI/src/emit-aarch64.h
    M dyninstAPI/src/inst-aarch64.C

  Log Message:
  -----------
  Implement doNotOverflow for ARMv8.
Implement load relative.
Fix emit immediate for plus and minus.



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