RFR: 8252689: Classes are loaded from jrt:/java.base even when CDS is used [v2]

[Yumin Qi]

> Java.util.jar.Manifest related classes not archived since they are neither in classlist or loaded in dump process.
> Manually create a dummy Manifest object will cause those classes loaded in dump and archived.

Yumin Qi has updated the pull request incrementally with one additional commit since the last revision:

  8252689: Classes are loaded from jrt:/java.base even when CDS is used

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/134/files
  - new: https://git.openjdk.java.net/jdk/pull/134/files/7c1df12f..ee270886

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=134&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=134&range=00-01

  Stats: 75 lines in 3 files changed: 73 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/134.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/134/head:pull/134

PR: https://git.openjdk.java.net/jdk/pull/134