RFR: 8275162: Use varargs in 'def' macros in mutexLocker.cpp

[Coleen Phillimore]

This change uses vararags in the 'def' and 'defl' macros in mutexLocker.cpp so that only the exceptions to the default parameter for _allow_vm_block are specified.
Some of these exceptions are not needed but that's a later patch that I'm working on.
Tested with tier1 sanity (all Oracle platforms) and tier1-3 linux-x64-debug, linux-x64, windows-x64-debug.

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Commit messages:
 - 8275162: Use varargs in 'def' macros in mutexLocker.cpp

Changes: https://git.openjdk.java.net/jdk/pull/6108/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6108&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275162
  Stats: 79 lines in 1 file changed: 0 ins; 0 del; 79 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6108.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6108/head:pull/6108

PR: https://git.openjdk.java.net/jdk/pull/6108