Gummiboot: Switch to zip archive.

For some reason tarballs from cgit have a different hash each time you download.
Merge commit 'refs/top-bases/experimental/parallel-building' into experimental/parallel-building

# By Shea Levy
# Via Shea Levy
* commit 'refs/top-bases/experimental/parallel-building':
  Gummiboot: Switch to zip archive.
Merge branch 'master' into refs/top-bases/experimental/eclipse

# By Shea Levy
# Via Shea Levy
* master:
  Gummiboot: Switch to zip archive.
Merge branch 'experimental/parallel-building' into refs/top-bases/experimental/eclipse

* experimental/parallel-building:
Merge commit 'refs/top-bases/experimental/eclipse' into experimental/eclipse

# By Shea Levy
# Via Marc Weber (3) and Shea Levy (1)
* commit 'refs/top-bases/experimental/eclipse':
  Gummiboot: Switch to zip archive.