[code-reflection] RFR: Ensure exception region exits are generated

[Paul Sandoz]

Ensure exception region exits are generated for break and continue instructions that exit a try block with only catch blocks (no finally block).

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Commit messages:
 - Ensure exception region exits are generated

Changes: https://git.openjdk.org/babylon/pull/252/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=252&range=00
  Stats: 812 lines in 3 files changed: 459 ins; 349 del; 4 mod
  Patch: https://git.openjdk.org/babylon/pull/252.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/252/head:pull/252

PR: https://git.openjdk.org/babylon/pull/252