RFR 8037825 Fix warnings and enable "warnings as errors" in serviceability native libraries

[Alan Bateman]

On 20/03/2014 09:13, Staffan Larsen wrote:
> Thanks!
>
> Still need someone to look at the actual code changes.
>
>
In webrev.01 then jdk/make/lib/ServiceabilityLibraries.gmk and 
src/solaris/native/sun/management/MacosxOperatingSystem.c are showing up 
as new files, I can't tell why that is.

The code changes mostly look good to me. The only change that isn't very 
clear (I had to stare at it for a few minutes) in log_messages.c where 
it's now two calls to strftime. It might be useful to include a comment 
to explain this, also maybe reduce the line length to make it easier for 
future side-by-side reviews.

-Alan.
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