RFR: 8276795: Deprecate seldom used CDS flags

[Harold Seigel]

Please review this small change to deprecate seldom used CDS flags.  The flags will be deprecated in 18, obsoleted in 19, and removed in a later release.

The changes were tested with Mach5 tiers 1-2 on Linux, Mac OS, and Windows, and Mach5 tiers 3-5 on Linux x64.

Thanks, Harold

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Commit messages:
 - 8276795: Deprecate seldom used CDS flags

Changes: https://git.openjdk.java.net/jdk/pull/6390/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6390&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276795
  Stats: 6 lines in 2 files changed: 4 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6390.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6390/head:pull/6390

PR: https://git.openjdk.java.net/jdk/pull/6390