perf/core improvements and fixes:

New feature:

- Account thread wait time (off cpu time) separately: sleep, iowait and
  preempt, based on the prev_state of the last event, show the breakdown
  when using "perf sched timehist --state" (Namhyumg Kim)

Infrastructure:

- Factor out pmu scale conversion code (Andi Kleen)

- Remove unnecessary feature-dwarf warning (David Carrillo-Cisneros)

- Add missing member name in OPT_() macros (Soramichi AKIYAMA)

- Move variables referenced in libperf.a object files from perf's main()
  file, so that other tools can use libperf.a with a different main()
  (Soramichi AKIYAMA)

Documentation:

- Fix 'perf script' man page about --dump-raw-trace option (Michael Petlan)

- Also allow forcing reading of non-root owned files by root in 'perf
  script' (Yannick Brosseau)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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