RFR: 8263200: Add -XX:StressCCP to CTW

[Igor Ignatyev]

Hi all,

could you please review the tiny patch which adds `-XX:+StressCCP` flag to CTW testlibrary?

from JBS:
> similar to StressLCM, StressGCM, and StressIGVN flags, recently introduced (by [JDK-8256535](https://bugs.openjdk.java.net/browse/JDK-8256535)) StressCCP can increase the probability to find compiler bugs, hence it makes sense to add this flag to CTW testlibrary.

testing:
 - [ ] `test/hotspot/jtreg/applications/ctw/` 20 times on `{linux,windows,macosx}-x64` 
 - [x] `testlibrary_tests/ctw/` on `macosx-x64`

Thanks,
-- Igor

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

Commit messages:
 - update copyright year
 - 8263200: Add -XX:StressCCP to CTW

Changes: https://git.openjdk.java.net/jdk/pull/2877/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2877&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263200
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2877.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2877/head:pull/2877

PR: https://git.openjdk.java.net/jdk/pull/2877