[jdk11u-dev] Integrated: Merge jdk11u:master

[Goetz Lindenmaier]

Merge build tag 11.0.16+8 from jdk11u to jdk11u-dev

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Commit messages:
 - Merge
 - 8283778: 11u GHA: Fix GCC 9 ubuntu package names
 - 8283018: 11u GHA: Update GCC 9 minor versions
 - 8275082: Update XML Security for Java to 2.3.0

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=964&range=00.0
 - jdk11u:master: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=964&range=00.1

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/964/files
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/964.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/964/head:pull/964

PR: https://git.openjdk.java.net/jdk11u-dev/pull/964