[DynInst_API:] [dyninst/dyninst] d087ef: Fix register conversion between Dyninst and ROSE

[Sunny Shah <shah28@xxxxxxxx>]

  Branch: refs/heads/arm64/feature/semantics
  Home:   https://github.com/dyninst/dyninst
  Commit: d087ef0ac96c21eaca191c744d220080c2b58840
      https://github.com/dyninst/dyninst/commit/d087ef0ac96c21eaca191c744d220080c2b58840
  Author: Sunny Shah <shah28@xxxxxxxx>
  Date:   2016-07-21 (Thu, 21 Jul 2016)

  Changed paths:
    M common/src/dyn_regs.C
    M dataflowAPI/rose/semantics/SymEvalSemantics.C
    M dataflowAPI/rose/semantics/SymEvalSemantics.h

  Log Message:
  -----------
  Fix register conversion between Dyninst and ROSE
* The conversion of a Dyninst register to ROSE was using the full integer value in MachRegister, whereas only the lower 16 bits have to be used.
* convert() in SymEvalSemantics now takes in a RegisterDescriptor as argument to support all register categories other than SIMD/FPR.

Also fixed a few small bugs in the Dispatcher class for ARM.