- Update to 5.6.0 (FATE#321456).
  Major changes:
  * Validation tests:  A substantial effort to add validation tests to PAPI to
    check and detect problems in the definition of PAPI preset events.
  * Event testing:  Thorough cleanup of code in the C and Fortran testing to
    add processor support, cleanup output and make the testing behavior
    consistent.
  * CUDA component:  Updated and rewritten to support CUPTI Metric API
    (combinations of basic events).  This component now supports NVLink
    information through the Metric API. Updated testing for the component.
  * NVML component: Updated to support power management limits and improved
    event names. Minor other bug fixes.
  * RAPL component: Added support for: Intel Atom models Goldmont / Gemini_Lake
    / Denverton, Skylake-X / Kabylake
  * PAPI preset events:  Many updates to the PAPI preset event mappings;
    Skylake X support, initial AMD fam17h, fix AMD fam16h, added more Power8
    events, initial Power9 events.
  Other changes:
  * Updating man and help pages for papi_avail and papi_native_avail.
  * Powercap component:  Added test for setting power caps via PAPI powercap
    component.
  * Infiniband component:  Bugfix for infiniband_umad component.
  * Uncore component:  Updated to support recent processors.
  * Lmsensors component updated to support correct runtime linking, better
    events name, and a number of bug fixes.
  * Updated and fixed timer support for multiple architectures.
  * All components: Cleanup and standardize testing behavior in the components.
  * Build system: Much needed cleanup of configure and make scripts.
  * Support for C++ was enhanced.
  * Enabling optional support for reading events using perfevent-rdpmc on

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