RFR: The Grand ScopedValue renaming [v2]

[Andrew Haley]

> Rename ExtentLocal to ScopedValue

Andrew Haley has updated the pull request incrementally with one additional commit since the last revision:

  Javadoc

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Changes:
  - all: https://git.openjdk.org/loom/pull/192/files
  - new: https://git.openjdk.org/loom/pull/192/files/521b9056..378f9777

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=loom&pr=192&range=01
 - incr: https://webrevs.openjdk.org/?repo=loom&pr=192&range=00-01

  Stats: 28 lines in 1 file changed: 0 ins; 0 del; 28 mod
  Patch: https://git.openjdk.org/loom/pull/192.diff
  Fetch: git fetch https://git.openjdk.org/loom pull/192/head:pull/192

PR: https://git.openjdk.org/loom/pull/192