perf/core improvements and fixes:

User visible:

- Allow suppressing 'uncore_' when specifying PMU events (Andi Kleen)

- Collapse identically named PMU events in 'perf stat', allow
  not merging it via --no-merge (Andi Kleen)

Fixes:

- Use more precise 'grep -v' to suppress unwanted 'objdump -dS'
  disassembly output to not ditch line:number lines needed by
  'perf annotate --print-lines' logic (Taeung Song)

Infrastructure:

- SDT (Statically Defined Tracing)/uprobes_events arguments improvements
  (Alexis Berlemont, Ravi Bangoria)

- Improvements for the handling of JSON described vendor events,
  including having an expression parser to calculate metrics
  from multiple vendor events (Andi Kleen)

- Update Intel JSON vendor event files (Andi Kleen)

- Restore error reporting in 'perf probe -d' when none of the events
  requested to be deleted exist. (Kefeng Wang)

- Bump MAX_CMDLEN in 'perf probe' to match what the kernel accepts
  (Ravi Bangoria)

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