2933 compiler warning gags need better granularity
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>

6659940 ON makefiles use wrong options for Sun Studio 12 compiler and lint.
6751897 usr/src/tools/cw.c needs to be updated for Sun Studio 12 switchover.

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