RFR: 8252723: make nsk/stress/stack/stack016.java runnable in Xcomp testing configuration

[Coleen Phillimore]

Add C2-only execution, but don't enable all Xcomp modes. This test gets StackOverflowError twice and takes a while with all the Xcomp test options. There are other tests that exercise stack overflow in the -Xcomp modes.

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Commit messages:
 - 8252723: make nsk/stress/stack/stack016.java runnable in Xcomp testing configuration

Changes: https://git.openjdk.java.net/jdk/pull/3058/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3058&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8252723
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3058.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3058/head:pull/3058

PR: https://git.openjdk.java.net/jdk/pull/3058