RFR: 8312488: tools/jpackage/share/AppLauncherEnvTest.java fails with dynamically linked libstdc++

[Vladimir Petko]

Use the  same approach as Logger::defaultLogger() to ensure that the appender is not destroyed before shared object destructor function is executed.

The alternative is to delete dcon() function, but we might run into a similiar tear-down issue later (e.g. logging from some object's destructor).


==============================
Test summary
==============================
   TEST                                              TOTAL  PASS  FAIL ERROR   
   jtreg:test/jdk/tools                                215   215     0     0   
==============================
TEST SUCCESS

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

Commit messages:
 - Avoid destroying log appenders set in launch() function.

Changes: https://git.openjdk.org/jdk/pull/14971/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14971&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8312488
  Stats: 10 lines in 1 file changed: 5 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/14971.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14971/head:pull/14971

PR: https://git.openjdk.org/jdk/pull/14971