RFR: 8328995: Launcher can't open jar files where the offset of the manifest is >4GB [v8]

[Liam Miller-Cushon]

> This change fixes a zip64 bug in the launcher that is prevent it from reading the manifest of jars where the 'relative offset of local header' field in the central directory entry is >4GB. As described in APPNOTE.TXT 4.5.3, the offset is too large to be stored in the central directory it is stored in a 'Zip64 Extended Information Extra Field'.

Liam Miller-Cushon has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 10 additional commits since the last revision:

 - Add a missing `break`
 - Merge branch 'master' into JDK-8328995
 - Merge remote-tracking branch 'origin/master' into JDK-8328995
 - Move test to test/jdk/tools/launcher
 - Add some more comments
 - Maximum Zip64 extra field length is 32
 - Make cendsk an unsigned short
 - Fix disk number size
 - Improvements
   
   * don't rely on variable length arrays
   * only run the test of 64 bit machines, since it requires >4GB of heap
 - 8328995: launcher can't open jar files where the offset of the manifest is >4GB

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18479/files
  - new: https://git.openjdk.org/jdk/pull/18479/files/da36c059..172609a3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18479&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18479&range=06-07

  Stats: 86273 lines in 2119 files changed: 54788 ins; 22033 del; 9452 mod
  Patch: https://git.openjdk.org/jdk/pull/18479.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18479/head:pull/18479

PR: https://git.openjdk.org/jdk/pull/18479