GitLab

* Remove setting of link libraries, include and link dirs and compile
  flags for each target, instead let Cmake deal with them by linking the
  main library to hip::host hiprtc::hiprtc hip::hipfft;
* Fix: custom command without ADD_CUSTOM_TARGET and ADD_DEPENDENCIES is
  executed for both static and shared targets;
* Remove IF(APPLE) parts.

Fix SegFault in HipCalcHippoNonbondedForceKernel

    HipSort was created using a temporary ref. Adding `HipContext& cu`
    field to HipCalcHippoNonbondedForceKernel fixes the issue;