Request for review (s) - 8155948: Add message for CMS deprecation for some internal builds

[Kim Barrett]

> On Aug 31, 2016, at 2:06 PM, Jon Masamitsu <jon.masamitsu at oracle.com> wrote:
> 
> Adds the support to emit a deprecation message in some builds.
> 
> https://bugs.openjdk.java.net/browse/JDK-8155948
> 
> A data structure is moved to a header file to allow
> sharing and a stub function is added which can be
> specialized for different builds.
> 
> http://cr.openjdk.java.net/~jmasa/8155948/webrev.00/

Mostly looks ok.  A style issue:

------------------------------------------------------------------------------ 
src/share/vm/runtime/arguments.hpp
  45 typedef struct {
...
  50 } SpecialFlag;

This is C++ code, not C. Rather than using typedef of an anonymous
struct, we should be using a named struct, e.g.

  struct SpecialFlag { ... };

------------------------------------------------------------------------------ 

There are some other similar typedefs in arguments.cpp that aren’t touched by this change.