[code-reflection] Integrated: Add relative paths to spirv iml fileso we can build with intellij

[Gary Frost]

Enable build of spirv from intellij

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Commit messages:
 - Add relative paths to spirv iml fileso we can build with intellij

Changes: https://git.openjdk.org/babylon/pull/133/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=133&range=00
  Stats: 10 lines in 4 files changed: 0 ins; 4 del; 6 mod
  Patch: https://git.openjdk.org/babylon/pull/133.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/133/head:pull/133

PR: https://git.openjdk.org/babylon/pull/133