RFR: 8211002: test/jdk/java/lang/Math/PowTests.java skips testing for non-corner-case values

[Brian Burkhalter]

Please consider this proposal to add some test coverage comparing `Math` and `StrictMath` results of `pow()`.

-------------

Commit messages:
 - 8211002: test/jdk/java/lang/Math/PowTests.java skips testing for non-corner-case values

Changes: https://git.openjdk.java.net/jdk/pull/4758/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4758&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8211002
  Stats: 18 lines in 1 file changed: 17 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4758.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4758/head:pull/4758

PR: https://git.openjdk.java.net/jdk/pull/4758