RFR: 8356390: Rename ResolvedIndyEntry::set_flags to set_has_appendix [v4]

[Johan Sjölen]

> The `set_flags` function really only sets whether it has an appendix or not, and there's a separate `set_resolution_failed` method just below that also alters the flag. Just rename this to `set_has_appendix`

Johan Sjölen has updated the pull request incrementally with one additional commit since the last revision:

  I should really stop pushing w/o first building

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25092/files
  - new: https://git.openjdk.org/jdk/pull/25092/files/4da8d47b..56e43e5a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25092&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25092&range=02-03

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/25092.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25092/head:pull/25092

PR: https://git.openjdk.org/jdk/pull/25092