[lworld] RFR: 8283573: [lworld] Make Object an abstract class [v2]

[Frederic Parain]

> 8283573: [lworld] Make Object an abstract class

Frederic Parain has updated the pull request incrementally with one additional commit since the last revision:

  Interpreter and copyright fixes

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Changes:
  - all: https://git.openjdk.java.net/valhalla/pull/602/files
  - new: https://git.openjdk.java.net/valhalla/pull/602/files/9db93b17..61efc102

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=valhalla&pr=602&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=valhalla&pr=602&range=00-01

  Stats: 9 lines in 3 files changed: 3 ins; 2 del; 4 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/602.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/602/head:pull/602

PR: https://git.openjdk.java.net/valhalla/pull/602