RFR: 8274405: Suppress warnings on non-serializable non-transient instance fields in javac and javadoc

[Joe Darcy]

Augmentations to javac's Xlint:serial checking are out for review (#5709) and various javac and javadoc implementation libraries would need some changes to pass under the expanded checks.

The changes are to suppress warnings where non-transient fields in serializable types are not declared with a type statically known to be serializable. That isn't necessarily a correctness issues, but it does merit further scrutiny.

I'll run a script to update the copyright year before pushing.

Sending this change out for review separately in an effort to de-bulk the review needed for the new checks themselves.

-------------

Commit messages:
 - 8274405: Suppress warnings on non-serializable non-transient instance fields in javac and javadoc

Changes: https://git.openjdk.java.net/jdk/pull/5728/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5728&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274405
  Stats: 12 lines in 12 files changed: 12 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5728.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5728/head:pull/5728

PR: https://git.openjdk.java.net/jdk/pull/5728