emerge: add --onlydeps-with-rdeps=<y|n> option (bug 294719)

Add --onlydeps-with-rdeps=n option in order to omit pure
run-time dependencies with --onlydeps. The dependencies
that get pulled in are those that are necessary for the
equivalent --buildpkgonly command to succeed. The default
--onlydeps behavior remains unchanged.

X-Gentoo-bug: 294719
X-Gentoo-bug-url: https://bugs.gentoo.org/show_bug.cgi?id=294719
Acked-by: Brian Dolbec <dolsen@gentoo.org>
4 files changed