sys/linux, executor: minor USB fixes

[xairy]

No description provided.

[codecov-io]

Codecov Report

Merging #1361 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1361   +/-   ##
=======================================
  Coverage   57.75%   57.75%           
=======================================
  Files         131      131           
  Lines       24695    24695           
=======================================
  Hits        14262    14262           
  Misses       9758     9758           
  Partials      675      675

Impacted Files	Coverage Δ
prog/rand.go	86.43% <0%> (-0.42%)	⬇️
prog/prog.go	81% <0%> (+1%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ca6f3cf...2573d4c. Read the comment docs.