RFR: 7903794: Allow to specify a zip file as an output

[Alexandre Iline]

See this for documentation changes: https://bugs.openjdk.org/browse/CODETOOLS-7903795

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Commit messages:
 - reverting a change
 - reverting a change
 - CODETOOLS-7903794: Allow to specify a zip file as an output
 - CODETOOLS-7903794: Allow to specify a zip file as an output

Changes: https://git.openjdk.org/jcov/pull/46/files
  Webrev: https://webrevs.openjdk.org/?repo=jcov&pr=46&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903794
  Stats: 258 lines in 3 files changed: 139 ins; 112 del; 7 mod
  Patch: https://git.openjdk.org/jcov/pull/46.diff
  Fetch: git fetch https://git.openjdk.org/jcov.git pull/46/head:pull/46

PR: https://git.openjdk.org/jcov/pull/46