RFR: Latest version of scope locals [v2]

[Andrew Haley]

> Integrate latest version of scope locals.

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

  Bindings are object fields, not address fields.

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Changes:
  - all: https://git.openjdk.java.net/loom/pull/39/files
  - new: https://git.openjdk.java.net/loom/pull/39/files/db102a73..c573d389

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=loom&pr=39&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=loom&pr=39&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/loom/pull/39.diff
  Fetch: git fetch https://git.openjdk.java.net/loom pull/39/head:pull/39

PR: https://git.openjdk.java.net/loom/pull/39