LibJS: Skip ordinary_call_bind_this() when possible

[kalenikaliaksandr]

If during parsing it was found that function won't use this then
there is no need to initialise this_value during call.

Suite       Test                                   Speedup  Old (Mean ± Range)        New (Mean ± Range)
----------  -----------------------------------  ---------  ------------------------  ------------------------
Kraken      ai-astar.js                              1      1.855 ± 1.850 … 1.860     1.855 ± 1.840 … 1.870
Kraken      audio-beat-detection.js                  1.014  1.440 ± 1.440 … 1.440     1.420 ± 1.410 … 1.430
Kraken      audio-dft.js                             1.063  1.270 ± 1.260 … 1.280     1.195 ± 1.190 … 1.200
Kraken      audio-fft.js                             1.023  1.335 ± 1.330 … 1.340     1.305 ± 1.300 … 1.310
Kraken      audio-oscillator.js                      1.021  1.480 ± 1.480 … 1.480     1.450 ± 1.450 … 1.450
Kraken      imaging-darkroom.js                      1.02   2.535 ± 2.510 … 2.560     2.485 ± 2.480 … 2.490
Kraken      imaging-desaturate.js                    1.027  2.075 ± 2.070 … 2.080     2.020 ± 2.010 … 2.030
Kraken      imaging-gaussian-blur.js                 1.025  7.720 ± 7.710 … 7.730     7.535 ± 7.530 … 7.540
Kraken      json-parse-financial.js                  1.071  0.150 ± 0.150 … 0.150     0.140 ± 0.140 … 0.140
Kraken      json-stringify-tinderbox.js              1.042  0.250 ± 0.250 … 0.250     0.240 ± 0.240 … 0.240
Kraken      stanford-crypto-aes.js                   1.032  0.650 ± 0.650 … 0.650     0.630 ± 0.630 … 0.630
Kraken      stanford-crypto-ccm.js                   1.036  0.570 ± 0.570 … 0.570     0.550 ± 0.550 … 0.550
Kraken      stanford-crypto-pbkdf2.js                1.023  1.135 ± 1.130 … 1.140     1.110 ± 1.110 … 1.110
Kraken      stanford-crypto-sha256-iterative.js      0.989  0.460 ± 0.460 … 0.460     0.465 ± 0.460 … 0.470
Octane      box2d.js                                 1.002  2.105 ± 2.100 … 2.110     2.100 ± 2.100 … 2.100
Octane      code-load.js                             1.005  2.080 ± 2.080 … 2.080     2.070 ± 2.070 … 2.070
Octane      crypto.js                                0.973  6.100 ± 6.100 … 6.100     6.270 ± 6.200 … 6.340
Octane      deltablue.js                             0.998  2.030 ± 2.030 … 2.030     2.035 ± 2.020 … 2.050
Octane      earley-boyer.js                          1.011  17.620 ± 17.360 … 17.880  17.430 ± 17.300 … 17.560
Octane      gbemu.js                                 1.014  2.975 ± 2.970 … 2.980     2.935 ± 2.920 … 2.950
Octane      mandreel.js                              0.997  13.955 ± 13.870 … 14.040  13.995 ± 13.940 … 14.050
Octane      navier-stokes.js                         0.998  3.170 ± 3.150 … 3.190     3.175 ± 3.150 … 3.200
Octane      pdfjs.js                                 1.005  2.925 ± 2.920 … 2.930     2.910 ± 2.900 … 2.920
Octane      raytrace.js                              0.997  5.565 ± 5.530 … 5.600     5.580 ± 5.570 … 5.590
Octane      regexp.js                                0.977  22.850 ± 22.850 … 22.850  23.385 ± 23.240 … 23.530
Octane      richards.js                              0.998  2.010 ± 2.010 … 2.010     2.015 ± 2.010 … 2.020
Octane      splay.js                                 0.974  2.615 ± 2.610 … 2.620     2.685 ± 2.670 … 2.700
Octane      typescript.js                            0.991  25.975 ± 25.690 … 26.260  26.220 ± 25.990 … 26.450
Octane      zlib.js                                  1.016  73.110 ± 72.260 … 73.960  71.970 ± 71.910 … 72.030
Kraken      Total                                    1.023  22.925                    22.400
Octane      Total                                    1.002  185.085                   184.775
All Suites  Total                                    1.004  208.010                   207.175