RFR: JDK-8327114: fix to resolve permissions issue as per: 8341246 [v2]

[Larry Cable]

> this is a fix to: https://bugs.openjdk.org/browse/JDK-8327114 
> 
> to resolve an issue detected in: 
> 
> https://bugs.openjdk.org/browse/JDK-8341246
> 
> sym link file accesses should be performed as "privileged" actions.

Larry Cable has updated the pull request incrementally with one additional commit since the last revision:

  JDK-8327114: fix to resolve permissions issue as per: 8341246, also privileged exists and isReadable invocations

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21312/files
  - new: https://git.openjdk.org/jdk/pull/21312/files/99a9b1b4..881bc574

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21312&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21312&range=00-01

  Stats: 21 lines in 1 file changed: 12 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/21312.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21312/head:pull/21312

PR: https://git.openjdk.org/jdk/pull/21312