RFR: JDK-8265253: javac -Xdoclint:all gives "no comment" warning for code that can't be commented

[Jonathan Gibbons]

Please review a simple update for doclint, to suppress "missing comment" warnings on the internally-synthesized class resulting from use of an anonymous class body in a member declaration in an enum class..

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Commit messages:
 - JDK-8265253: javac -Xdoclint:all gives "no comment" warning for code that can't be commented

Changes: https://git.openjdk.java.net/jdk/pull/5206/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5206&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265253
  Stats: 60 lines in 3 files changed: 59 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5206.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5206/head:pull/5206

PR: https://git.openjdk.java.net/jdk/pull/5206