bob: Update to 0.99.3.
* Switch to an upstream commit with illumos support for lua-src so that we can
use the bundled version. OmniOS is now supported, as it does not provide a
native lua package.
* Generate setup.log for bob's internal handling of preparing for a build, and
include them in the report, so that users are made aware of any failures that
prevented a package build from starting.
* Various logging and error handling improvements.
* Add `--from` and `--to` support to `bob diff`.
* Add `bob publish --baseline` to compare against a specific build run instead
of the previous, useful if the previous build ended up being unusable.
* Support `bob util import-pscan --no-resolve`
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