RFR: 8292016: Split Windows API error handling from errors passed through the runtime in the JDK [v30]

[Julian Waters]

> EDIT: Cave and add the ErrorOrigin enum, to differentiate which error type the error reporting functions in libjava will look up. RUNTIME refers to errors passed through the runtime via errno, and SYSTEM is for native errors not visible to the runtime.

Julian Waters 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 15 additional commits since the last revision:

 - Merge remote-tracking branch 'upstream/master' into rework
 - Cleanup
 - Finish
 - Merge remote-tracking branch 'upstream/master' into rework
 - Cleanup
 - Cleanup
 - JNU_ThrowByNameWithMessageAndLastError
 - Progress
 - Remove getErrorString
 - Merge remote-tracking branch 'upstream/master' into rework
 - ... and 5 more: https://git.openjdk.org/jdk/compare/058336df...962b90ca

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9870/files
  - new: https://git.openjdk.org/jdk/pull/9870/files/6b43fc60..962b90ca

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9870&range=29
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9870&range=28-29

  Stats: 638 lines in 24 files changed: 418 ins; 159 del; 61 mod
  Patch: https://git.openjdk.org/jdk/pull/9870.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9870/head:pull/9870

PR: https://git.openjdk.org/jdk/pull/9870