Change HCONTEXT name prefix to 'top_dynamic_'

[SzymonLabedziewski]

No description provided.

[SzymonLabedziewski]

[ms] lazy filter_map_sum on small vector 0.001447
[ms] basic filter_map_sum on small vector 0.001446
[ms] lazy filter_map_sum on big vector 0.154652
[ms] basic filter_map_sum on big vector 0.225522
[ms] lazy filter_map_sum on large vector 59.0857
[ms] basic filter_map_sum on large vector 60.1445
[ms] histogramming fixed context names 2384.59
[ms] histogramming changing context names 533.68
[ms] prof1 with context switches 567.695
[ms] prof2 1228.72