RFR: 7903339: unsigned typedefs are not extracted

Fri Sep 30 15:43:24 UTC 2022

unsigned, signed primitive types were not handled in OutputFactory.visitTypedef.

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Commit messages:
 - 7903339: unsigned typedefs are not extracted

Changes: https://git.openjdk.org/jextract/pull/80/files
 Webrev: https://webrevs.openjdk.org/?repo=jextract&pr=80&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903339
  Stats: 107 lines in 3 files changed: 106 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jextract/pull/80.diff
  Fetch: git fetch https://git.openjdk.org/jextract pull/80/head:pull/80

PR: https://git.openjdk.org/jextract/pull/80