[foreign-memaccess] RFR: 8253306: jcheck should not be too picky about PR messages on panama-foreign

[Maurizio Cimadamore]

What the subject says :-)

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Commit messages:
 - Remove issue check

Changes: https://git.openjdk.java.net/panama-foreign/pull/338/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=338&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253306
  Stats: 4 lines in 1 file changed: 0 ins; 3 del; 1 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/338.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/338/head:pull/338

PR: https://git.openjdk.java.net/panama-foreign/pull/338