RFR: 8295044: Implementation of Foreign Function and Memory API (Second Preview) [v2]

[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 with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 17 additional commits since the last revision:

 - Merge branch 'master' into PR_20
 - Merge branch 'master' into PR_20
 - Merge pull request #14 from minborg/small-javadoc
   
   Update some javadocs
 - Update some javadocs
 - Revert some javadoc changes
 - Merge branch 'master' into PR_20
 - Fix benchmark and test failure
 - Merge pull request #13 from minborg/revert-factories
   
   Revert MemorySegment factories
 - Update javadocs after comments
 - Revert MemorySegment factories
 - ... and 7 more: https://git.openjdk.org/jdk/compare/7eb59e41...3d933028

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10872/files
  - new: https://git.openjdk.org/jdk/pull/10872/files/ac7733da..3d933028

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10872&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10872&range=00-01

  Stats: 51371 lines in 672 files changed: 16181 ins; 32391 del; 2799 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