[foreign-memaccess+abi] RFR: Split tests [v2]

[Per Minborg]

> This PR suggests splitting up a test class into two and only run the slow one on 64-bit systems.

Per Minborg has updated the pull request incrementally with one additional commit since the last revision:

  Update copyright year

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Changes:
  - all: https://git.openjdk.org/panama-foreign/pull/908/files
  - new: https://git.openjdk.org/panama-foreign/pull/908/files/c870bcb8..2ac225c9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=panama-foreign&pr=908&range=01
 - incr: https://webrevs.openjdk.org/?repo=panama-foreign&pr=908&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/panama-foreign/pull/908.diff
  Fetch: git fetch https://git.openjdk.org/panama-foreign.git pull/908/head:pull/908

PR: https://git.openjdk.org/panama-foreign/pull/908