[code-reflection] Integrated: I messed up prev PR blockId vs blockIdx

[Gary Frost]

Testing on NVIDIA revealed a typo (blockId vs blockIdx) 

This should fix that.

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Commit messages:
 - I messed up prev PR blockId vs blockIdx

Changes: https://git.openjdk.org/babylon/pull/777/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=777&range=00
  Stats: 9 lines in 1 file changed: 0 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/babylon/pull/777.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/777/head:pull/777

PR: https://git.openjdk.org/babylon/pull/777