[foreign-jextract] RFR: 8244425: primitive typedef names differing only in case mapped to nested classes with names differing only in case

[Athijegannathan Sundararajan]

creating case-insensitive unique names for all nested classes.

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Commit messages:
 - 8244425: primitive typedef names differing only in case mapped to nested classes with names differing only in case

Changes: https://git.openjdk.java.net/panama-foreign/pull/145/files
 Webrev: https://webrevs.openjdk.java.net/panama-foreign/145/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8244425
  Stats: 28 lines in 4 files changed: 11 ins; 10 del; 7 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/145.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/145/head:pull/145

PR: https://git.openjdk.java.net/panama-foreign/pull/145