lib/oeqa: use the new manifest file for determining if a package is installed
Use the new manifest file instead of ${WORKDIR}/installed_pkgs.txt for determining
if an image has a certain package, because installed_pkgs.txt goes away with rm_work
enabled.
We can't use the IMAGE_MANIFEST var for the file path because that relies on IMAGE_NAME which
changes at every run (because of date), so we use the link which points to the last
one built.
[ YOCTO #5072 ]
Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
