Add --build-image option to build command

[shuheiktgw]

Hi, I tried solving the issue #1092, and added --build-image option to build command! Thanks! 👍

[codecov-io]

Codecov Report

Merging #1591 into master will decrease coverage by 0.04%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master    #1591      +/-   ##
==========================================
- Coverage   46.51%   46.46%   -0.05%     
==========================================
  Files         118      118              
  Lines        5044     5049       +5     
==========================================
  Hits         2346     2346              
- Misses       2464     2469       +5     
  Partials      234      234

Impacted Files	Coverage Δ
pkg/skaffold/config/options.go	88.23% <ø> (ø)	⬆️
pkg/skaffold/runner/dev.go	56.52% <0%> (ø)	⬆️
cmd/skaffold/app/cmd/dev.go	0% <0%> (ø)	⬆️
cmd/skaffold/app/cmd/build.go	0% <0%> (ø)	⬆️
pkg/skaffold/runner/filters.go	100% <100%> (ø)	⬆️

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