Add nom (parsing) runtime benchmark

[Kobzol]

Finished parsing/nom-json (1/1)
    [Instructions]: min:   2,711,587,765    mean:    2,713,278,321    stddev:     891,427
          [Cycles]: min:     915,086,050    mean:      926,997,372    stddev:  11,265,969
  [Wall time [µs]]: min:         217,953    mean:          223,087    stddev:       5,706
   [Branch misses]: min:       3,014,519    mean:        3,040,071    stddev:      27,916
    [Cache misses]: min:       1,489,646    mean:        1,506,723    stddev:       9,761

Later we could also add some binary format parsing, e.g. FLV or MKV.