perf tools: Enable config and setting names for legacy cache events

This patch allows setting config terms for legacy cache events.
For example:

  # perf stat -e L1-icache-misses/name=valA/ -e branches/name=valB/ ls
  ...
   Performance counter stats for 'ls':

              11299      valA
             451605      valB

        0.000779091 seconds time elapsed

  # perf record -e cache-misses/name=inh/ -e cache-misses/name=noinh,no-inherit/ bash
  # ls
  # exit
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.023 MB perf.data (131 samples) ]
  # perf report --stdio | grep -B 1 'Event count'
  # Samples: 105  of event 'inh'
  # Event count (approx.): 109118
  --
  # Samples: 26  of event 'noinh'
  # Event count (approx.): 48302

A test case is introduced to test this feature.

Signed-off-by: Wang Nan <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Brendan Gregg <[email protected]>
Cc: Cody P Schafer <[email protected]>
Cc: He Kuang <[email protected]>
Cc: Jeremie Galarneau <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kirill Smelkov <[email protected]>
Cc: Li Zefan <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Zefan Li <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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