12217 add ld assert-deflib and guidance to gate build
Reviewed by: Robert Mustacchi <rm@fingolfin.org>
Reviewed by: Gergő Mihály Doma <domag02@gmail.com>
Approved by: Dan McDonald <danmcd@joyent.com>

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

OpenSolaris Launch