[foreign-memaccess+abi] RFR: Fix assert on jdk.module.enable.native.access

[Jorn Vernee]

Hi,

This fixes an assert that fires due to use of the `jdk.module.enable.native.access` property not being accounted for in the assertion check.

Thanks,
Jorn

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Commit messages:
 - Fix assert on jdk.module.enable.native.access

Changes: https://git.openjdk.java.net/panama-foreign/pull/481/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=481&range=00
  Stats: 4 lines in 1 file changed: 3 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/481.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/481/head:pull/481

PR: https://git.openjdk.java.net/panama-foreign/pull/481