RFR: 8266232: compiler.c1.TestRangeCheckEliminated should be run in driver mode

[Igor Ignatyev]

Hi all,

could you please review this small patch that changes `compiler.c1.TestRangeCheckEliminated` to be run in driver mode (as the actual testing is done in the JVMs spawned by it, `TestRangeCheckEliminated` just verifies their output)? the patch also makes a few small code style changes.

Thanks,
-- Igor

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Commit messages:
 - 8266232

Changes: https://git.openjdk.java.net/jdk/pull/3772/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3772&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266232
  Stats: 12 lines in 1 file changed: 2 ins; 2 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3772.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3772/head:pull/3772

PR: https://git.openjdk.java.net/jdk/pull/3772