[crac] RFR: Adapted some FileDescriptor tests for Win

[Roman Marchenko]

Made changes regarding FileDescriptor for Win platorm, adapted some tests.

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Commit messages:
 - Fixed nativeDescription0 for Win
 - Changes to nativeDescription (win)
 - Adapted JarFileFactory
 - Merge branch 'crac' into win_fd
 - Enabling test in Windows
 - Implemented Java_java_io_FileDescriptor_nativeDescription0 on Windows

Changes: https://git.openjdk.org/crac/pull/91/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=91&range=00
  Stats: 104 lines in 5 files changed: 90 ins; 3 del; 11 mod
  Patch: https://git.openjdk.org/crac/pull/91.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/91/head:pull/91

PR: https://git.openjdk.org/crac/pull/91