fix: fix gcloud SDK detection on Windows

[kevin-wise]

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Fixes #383

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[codecov]

Codecov Report

Merging #384 (ab2e2db) into master (09fac9d) will increase coverage by 0.13%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master     #384      +/-   ##
============================================
+ Coverage     67.60%   67.74%   +0.13%     
  Complexity      384      384              
============================================
  Files            36       36              
  Lines          1985     1981       -4     
  Branches        268      267       -1     
============================================
  Hits           1342     1342              
+ Misses          535      531       -4     
  Partials        108      108              

Impacted Files	Coverage Δ	Complexity Δ
...a/com/google/cloud/testing/BaseEmulatorHelper.java	32.16% <0.00%> (+0.73%)	5.00 <0.00> (ø)

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[kevin-wise]

@googlebot I signed it!

[kevin-wise]

Cut a local build and tested with my project, it seems to work as intended.

[chingor13]

Thanks for the patch!

[kevin-wise]

@chingor13 thanks for merging. This is my first time contributing to this project. What is the release schedule? Or when can I expect this fix to be released?