Add an error message when running hyperkit without permissions.

[dlorenc]

No description provided.

[codecov-io]

Codecov Report

Merging #2215 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2215      +/-   ##
==========================================
+ Coverage   27.73%   27.74%   +0.01%     
==========================================
  Files          82       82              
  Lines        5539     5539              
==========================================
+ Hits         1536     1537       +1     
  Misses       3807     3807              
+ Partials      196      195       -1

Impacted Files	Coverage Δ
pkg/util/kubeconfig/config.go	48.29% <0%> (+0.68%)	⬆️

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