Makefile.inc1: allow real-update-packages to be called independently
To perform an incremental update of a pkgbase repo, you would
call 'make update-packages', which will stage, create, and
incrementally choose newer package versions to sign as part
of a pkg repo. However, this forces you to stage the kernel
and source packages along with the world packages. For a
jail-only installation of FreeBSD, these packages are generally
not required.
This patch separates the 'update-packages' target from the
'real-update-packages' target to allow choosing world, kernel,
and/or source individually at the command line like so:
Jail-only installation:
- make -j`nproc` buildworld
- make PKG_VERSION='15.snap<date>' \ stage-packages-world create-packages-world \ real-update-packages
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1445
Closes: https://github.com/freebsd/freebsd-src/pull/1445