RFR: Merge jdk [v2]

[Mikael Vidstedt]

> Merge in jdk-15+14

Mikael Vidstedt has updated the pull request with a new target base due to a merge or a rebase. The pull request now
contains 65 commits:

 - Merge jdk
 - Update .jcheck/conf
 - Fix test/jdk/tools/launcher/Test7029048.java
 - Merge
 - Fix test/hotspot/jtreg/runtime/8176717/TestInheritFD.java
 - Merge
 - Merge
 - Merge
 - Merge
 - Merge
 - ... and 55 more: https://git.openjdk.java.net/portola/compare/6b487c3c...a67121be

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

Changes: https://git.openjdk.java.net/portola/pull/2/files
 Webrev: https://webrevs.openjdk.java.net/portola/2/webrev.01
  Stats: 557 lines in 38 files changed: 447 ins; 28 del; 82 mod
  Patch: https://git.openjdk.java.net/portola/pull/2.diff
  Fetch: git fetch https://git.openjdk.java.net/portola pull/2/head:pull/2

PR: https://git.openjdk.java.net/portola/pull/2