RFR: 8337143: (fc, fs) Move filesystem-related native objects from libnio to libjava [v8]

[Brian Burkhalter]

> This proposed change would move the native objects required for NIO file interaction from the libnio native library to the libjava native library on Linux, macOS, and Windows.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8337143: Minor makefile tweak

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20317/files
  - new: https://git.openjdk.org/jdk/pull/20317/files/853d3491..b54b1683

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20317&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20317&range=06-07

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20317.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20317/head:pull/20317

PR: https://git.openjdk.org/jdk/pull/20317