Add sort boolean benchmark

[alamb]

Which issue does this PR close?

Re #447

Rationale for this change

While reviewing #448 I wanted to measure performance change

What changes are included in this PR?

Benchmark for sorting boolean arrays

[codecov-commenter]

Codecov Report

Merging #457 (63aa15a) into master (e21f576) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #457   +/-   ##
=======================================
  Coverage   82.64%   82.64%           
=======================================
  Files         164      164           
  Lines       45508    45508           
=======================================
  Hits        37609    37609           
  Misses       7899     7899           

Impacted Files	Coverage Δ
arrow/src/array/array_binary.rs	90.13% <0.00%> (ø)

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[jimexist]

was wondering what if you increase it to say 2^16?

[alamb]

Whoops -- not sure why I closed (rather than merging) this branch