There are several issues with rpmdeps after the rpm v5 -> v4 transition:
* _rpmfc_magic_path is an invalid option for rpm4
* --rpmpopt is an invalid option for rpm4
* we need to use the path to rpmrc since otherwise it poitns at the
original build path
* we need to set MAGIC in the environment so libmagic can find its
files.
This patch addresses those and ensures rpmdeps works in relocated builds
from sstate (or with rm_work).
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
