[master] RFR: Fix CompressedClassPointersEncodingScheme for aarch64 with -UseCOH

[Thomas Stuefe]

There had been two errors.

- the literal was missing the L to make it long
- the first test that tests mapping below the 32g boundary was using a far too low address.

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Commit messages:
 - fix CompressedClassPointersEncodingScheme for aarch64 with -UseCOH

Changes: https://git.openjdk.org/lilliput/pull/164/files
  Webrev: https://webrevs.openjdk.org/?repo=lilliput&pr=164&range=00
  Stats: 5 lines in 1 file changed: 2 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/lilliput/pull/164.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/164/head:pull/164

PR: https://git.openjdk.org/lilliput/pull/164