[foreign-memaccess+abi] RFR: Add var handle support for boolean and MemoryAddress carrier

[Maurizio Cimadamore]

Add var handle support for boolean and MemoryAddress carrier

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Commit messages:
 - Merge branch 'foreign-memaccess+abi' into handle_address
 - Add support for C_BOOL layout in CLinker
 - Revert spurious changes
 - Drop support for bulk operations for boolean[]
 - Optimize bulk copy with booleans
 - Remove boolean[] segment views
 - Initial push

Changes: https://git.openjdk.java.net/panama-foreign/pull/564/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=564&range=00
  Stats: 245 lines in 23 files changed: 180 ins; 20 del; 45 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/564.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/564/head:pull/564

PR: https://git.openjdk.java.net/panama-foreign/pull/564