Make dependency auto-generation the default.

If, for some reason, this causes problems for a build,
disable in your build.sh by setting NO_AUTO_DEPENDS to a non-null value.
Remove obsolete auto-depends activation
Incorporate on entire for depends auto-generation.

Prevents installing a higher-versioned package built on a previous
release from installing on a later release.
gnupg version bump

Remove DEPENDS_IPS as the deps are correctly auto-generated now.
Switch to circonus-labs version.

Use the new install-illumos target to have standard checks pre-enabled
and the SMF manifest installed.