Add progress display of translate when using --kcov option

[ko1nksm]

No description provided.

[codecov]

Codecov Report

Merging #42 into master will increase coverage by 0.11%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #42      +/-   ##
==========================================
+ Coverage   43.38%   43.49%   +0.11%     
==========================================
  Files          84       84              
  Lines        3082     3145      +63     
==========================================
+ Hits         1337     1368      +31     
- Misses       1745     1777      +32

Impacted Files	Coverage Δ
libexec/shellspec-translate.sh	0% <ø> (ø)	⬆️
lib/libexec/kcov-executor.sh	44.23% <0%> (ø)	⬆️
lib/libexec/shellspec.sh	100% <0%> (ø)	⬆️
shellspec	0% <0%> (ø)	⬆️

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