RFR: JDK-8296403: [TESTBUG] IR test runner methods in TestLongRangeChecks.java invoke wrong test methods

[Damon Fenacci]

The `testStrideNegScalePosInIntLoop2` and `testStridePosScaleNegInIntLoop2` tests of the IR test _TestLongRangeChecks.java_ invoke the wrong test methods.

Changing the test method calls to invoke the right ones.

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Commit messages:
 - JDK-8296403: [TESTBUG] IR test runner methods in TestLongRangeChecks.java invoke wrong test methods

Changes: https://git.openjdk.org/jdk/pull/12088/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12088&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8296403
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/12088.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12088/head:pull/12088

PR: https://git.openjdk.org/jdk/pull/12088