[lworld] RFR: 8282106: [lworld] IdentityException should identify the value class [v2]

[Frederic Parain]

> Improve the message of IdentityException by including the class of the instance that triggered the exception.

Frederic Parain has updated the pull request incrementally with two additional commits since the last revision:

 - Fix indentation
 - Add aarch64 support

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

Changes:
  - all: https://git.openjdk.org/valhalla/pull/1150/files
  - new: https://git.openjdk.org/valhalla/pull/1150/files/c5c859a0..866b2b0d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=1150&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=1150&range=00-01

  Stats: 28 lines in 4 files changed: 7 ins; 7 del; 14 mod
  Patch: https://git.openjdk.org/valhalla/pull/1150.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1150/head:pull/1150

PR: https://git.openjdk.org/valhalla/pull/1150