Fix OS 32-bit artifact fetching

[JaciBrunning]

This PR will close #428 upon merging

[codecov-io]

Current coverage is 51.74%

Merging #438 into master will decrease coverage by -0.05% as of 06714a2

@@            master    #438   diff @@
======================================
  Files          122     122       
  Stmts         3614    3614       
  Branches       415     415       
  Methods          0       0       
======================================
- Hit           1872    1870     -2
- Partial        117     118     +1
- Missed        1625    1626     +1

Review entire Coverage Diff as of 06714a2

---

Uncovered Suggestions

1. +0.58% via .../ExceptionAlert.java#83...103
2. +0.41% via ...cketPreviewView.java#90...104
3. +0.39% via ...cketPreviewView.java#38...51
4. See 7 more...

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[ThomasJClark]

Isn't this equivalent to def os = osdetector.classifier.replace("osx", "macosx").replace("x86_32", "x86")?

[JaciBrunning]

Fair note

[JLLeitschuh]

Thanks!