RFR: 8305419: JDK-8301995 broke building libgraal

Fri Apr 7 19:48:38 UTC 2023

There were some minor mismatches is where the indy index was passed and where the real constant pool index was used.  There's no general test of `loadReferencedType` but I modified TestDynamicConstant to exercise it.  The arguments to the invokedynamic in that test were mildly broken as well which was only exposed once we tried to resolve it.

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Commit messages:
 - Fix invokedynamic index handling
 - Add test to exercise loadReferencedType for invokedynamic

Changes: https://git.openjdk.org/jdk/pull/13392/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13392&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305419
  Stats: 53 lines in 4 files changed: 24 ins; 17 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/13392.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13392/head:pull/13392

PR: https://git.openjdk.org/jdk/pull/13392