Integrated: 8260870: [type-restrictions] Generate RestrictedMethod attributes

[Srikanth Adayapalam]

Support for generation of RestrictedMethod attribute both via command line option and type annotations.

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Commit messages:
 - 8260870: [type-restrictions] Generate RestrictedMethod attributes

Changes: https://git.openjdk.java.net/valhalla/pull/325/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=325&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260870
  Stats: 504 lines in 14 files changed: 502 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/325.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/325/head:pull/325

PR: https://git.openjdk.java.net/valhalla/pull/325