[foreign-jextract] RFR: 8281764: jextract does not generate parameter names for function pointer typedefs

[Athijegannathan Sundararajan]

Propagating TypedefDecl's ParmDecl child cursors to Types.

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Commit messages:
 - 8281764: jextract does not generate parameter names for function pointer typedefs

Changes: https://git.openjdk.java.net/panama-foreign/pull/646/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=646&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8281764
  Stats: 142 lines in 11 files changed: 120 ins; 2 del; 20 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/646.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/646/head:pull/646

PR: https://git.openjdk.java.net/panama-foreign/pull/646