RFR: 8257988: Remove JNF dependency from libsaproc/MacosxDebuggerLocal.m

[Phil Race]

This removes the JNF dependency from the jdk.hotspot.agent module.
The macro expansions are the same as already used in the Java desktop module - which actually uses a macro
still but there there are hundreds of uses.
The function of this macro code is to prevent NSExceptions escaping to Java and also to drain the auto-release pool.
What test group would be good for verifying this change ?

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Commit messages:
 - 8257988: Remove JNF dependency from libsaproc/MacosxDebuggerLocal.m
 - 8257988: Remove JNF dependency from libsaproc/MacosxDebuggerLocal.m

Changes: https://git.openjdk.java.net/jdk/pull/2304/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2304&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257988
  Stats: 42 lines in 2 files changed: 32 ins; 2 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2304.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2304/head:pull/2304

PR: https://git.openjdk.java.net/jdk/pull/2304