RFR: 8361013: JMH does not export sufficient modules to benchmark ImageReader

[David Beaumont]

Added jimage and jrtfs exports.

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Commit messages:
 - Hacking build file for benchmark

Changes: https://git.openjdk.org/jdk/pull/26035/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26035&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361013
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26035.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26035/head:pull/26035

PR: https://git.openjdk.org/jdk/pull/26035