RFR: JDK-8310380: Handle problems in core-related tests on macOS when codesign tool does not work

[Matthias Baesken]

Currently, a number of tests fail on macOS because they miss the core file (e.g. serviceability/sa/TestJmapCore.java).
The reason is that configure detects on some setups that codesign does not work ("checking if debug mode codesign is possible... no) .
So adding the needed entitlement to generate cores is not done in the build. This is currently not checked later in the tests.
But without the entitlement, a core is not generated.

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Commit messages:
 - JDK-8310380

Changes: https://git.openjdk.org/jdk/pull/14562/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14562&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310380
  Stats: 36 lines in 3 files changed: 35 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14562.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14562/head:pull/14562

PR: https://git.openjdk.org/jdk/pull/14562