RFR: Merge jdk [v2]

[Mikael Vidstedt]

> Merge in jdk-16+12

Mikael Vidstedt has updated the pull request with a new target base due to a merge or a rebase. The pull request now
contains 71 commits:

 - Merge jdk
 - Merge jdk
 - Merge jdk
 - Merge jdk
 - Merge jdk
 - Merge jdk
 - Merge jdk
 - Update .jcheck/conf
 - Fix test/jdk/tools/launcher/Test7029048.java
 - Merge
 - ... and 61 more: https://git.openjdk.java.net/portola/compare/49e7609d...c0fc2582

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Changes: https://git.openjdk.java.net/portola/pull/11/files
 Webrev: https://webrevs.openjdk.java.net/portola/11/webrev.01
  Stats: 522 lines in 36 files changed: 442 ins; 5 del; 75 mod
  Patch: https://git.openjdk.java.net/portola/pull/11.diff
  Fetch: git fetch https://git.openjdk.java.net/portola pull/11/head:pull/11

PR: https://git.openjdk.java.net/portola/pull/11