RFR: JDK-8277375: jdeps errors on a class path with a file path with no permission

[Mandy Chung]

This changes jdeps -cp to ignore files/directories with no permission to access.  This is consistent with the runtime behavior.

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Commit messages:
 - JDK-8277375: jdeps errors on a class path with a file path with no permission

Changes: https://git.openjdk.java.net/jdk/pull/6531/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6531&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277375
  Stats: 113 lines in 2 files changed: 106 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6531.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6531/head:pull/6531

PR: https://git.openjdk.java.net/jdk/pull/6531