[code-reflection] RFR: Fix failing cases in SwitchStatementTest

[Mourad Abbay]

In a previous PR, we merged an update to avoid boxing when concatenating a string with a primitive, this update affected some cases in `SwitchStatementTest`. In this PR we update the expected IR for these cases.

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Commit messages:
 - Update expected IR

Changes: https://git.openjdk.org/babylon/pull/234/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=234&range=00
  Stats: 338 lines in 1 file changed: 0 ins; 17 del; 321 mod
  Patch: https://git.openjdk.org/babylon/pull/234.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/234/head:pull/234

PR: https://git.openjdk.org/babylon/pull/234