RFR: Scope locals, Mark II. [v2]

[Andrew Haley]

> Leaner and meaner.

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

  Back out ForkJoinTask changes for now

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

Changes:
  - all: https://git.openjdk.java.net/loom/pull/26/files
  - new: https://git.openjdk.java.net/loom/pull/26/files/60f99986..cfe51a74

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=loom&pr=26&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=loom&pr=26&range=00-01

  Stats: 7 lines in 1 file changed: 0 ins; 6 del; 1 mod
  Patch: https://git.openjdk.java.net/loom/pull/26.diff
  Fetch: git fetch https://git.openjdk.java.net/loom pull/26/head:pull/26

PR: https://git.openjdk.java.net/loom/pull/26