[code-reflection] Integrated: Removed hardcoded nvcc path

[Gary Frost]

Rookie mistake.   I had accidently hardcoded path to nvcc in nvidia backend.

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Commit messages:
 - Removed hardcoded nvcc path

Changes: https://git.openjdk.org/babylon/pull/426/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=426&range=00
  Stats: 7 lines in 1 file changed: 0 ins; 1 del; 6 mod
  Patch: https://git.openjdk.org/babylon/pull/426.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/426/head:pull/426

PR: https://git.openjdk.org/babylon/pull/426