RFR: Merge jdk:master

[Jorn Vernee]

Manual merge of jdk:master into master to pull in some of the changes from earlier this week (most notably https://github.com/openjdk/panama-foreign/commit/a6ad42e00eaa1c1a476df9fac399f16de53a7a8b)

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Commit messages:
 - Merge branch 'jdk_master' into Merge_Master
 - 8309746: Reconfigure check should include make/conf/version-numbers.conf
 - 8308585: AC_REQUIRE: `PLATFORM_EXTRACT_TARGET_AND_BUILD' was expanded before it was required
 - 8309928: JFR: View issues
 - 8309959: JFR: Display N/A for missing data amount
 - 8309880: Add support for linking libffi on Windows and Mac
 - 8309957: Rename JDK-8309595 test to conform
 - 8309847: FrameForm and RegisterForm constructors should initialize all members
 - 8309613: [Windows] hs_err files sometimes miss information about the code containing the error
 - 8309890: TestStringDeduplicationInterned.java waits for the wrong condition
 - ... and 62 more: https://git.openjdk.org/panama-foreign/compare/97a61be6...8dff741e

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.org/panama-foreign/pull/837/files
  Stats: 13365 lines in 451 files changed: 4164 ins; 7691 del; 1510 mod
  Patch: https://git.openjdk.org/panama-foreign/pull/837.diff
  Fetch: git fetch https://git.openjdk.org/panama-foreign.git pull/837/head:pull/837

PR: https://git.openjdk.org/panama-foreign/pull/837