RFR: 8295044: Implementation of Foreign Function and Memory API (Second Preview) [v7]

[Maurizio Cimadamore]

> This PR contains the API and implementation changes for JEP-434 [1]. A more detailed description of such changes, to avoid repetitions during the review process, is included as a separate comment.
> 
> [1] - https://openjdk.org/jeps/434

Maurizio Cimadamore has updated the pull request incrementally with seven additional commits since the last revision:

 - Update src/java.base/share/classes/java/lang/foreign/MemorySession.java
   
   Co-authored-by: Paul Sandoz <paul.d.sandoz at googlemail.com>
 - Update src/java.base/share/classes/java/lang/foreign/MemorySegment.java
   
   Co-authored-by: Paul Sandoz <paul.d.sandoz at googlemail.com>
 - Update src/java.base/share/classes/java/lang/foreign/MemorySegment.java
   
   Co-authored-by: Paul Sandoz <paul.d.sandoz at googlemail.com>
 - Update src/java.base/share/classes/java/lang/foreign/MemoryLayout.java
   
   Co-authored-by: Paul Sandoz <paul.d.sandoz at googlemail.com>
 - Update src/java.base/share/classes/java/lang/foreign/Arena.java
   
   Co-authored-by: Paul Sandoz <paul.d.sandoz at googlemail.com>
 - Update src/java.base/share/classes/java/lang/foreign/Arena.java
   
   Co-authored-by: Paul Sandoz <paul.d.sandoz at googlemail.com>
 - Bring windows CallArranger in sync with panama repo (again)

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10872/files
  - new: https://git.openjdk.org/jdk/pull/10872/files/f04be0da..cc4ff582

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10872&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10872&range=05-06

  Stats: 31 lines in 6 files changed: 0 ins; 1 del; 30 mod
  Patch: https://git.openjdk.org/jdk/pull/10872.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10872/head:pull/10872

PR: https://git.openjdk.org/jdk/pull/10872