lib/oe/manifest.py: add library for image manifest creation
This new library allows for the creation of 2 types of manifests:
* initial manifest - used by the new rootfs creation routines to
generate the rootfs;
* final_manifest - this will contain all the packages in the image,
after all installations finished;
Usage:
Manifest(d, manifest_dir).create_initial()
Manifest(d, manifest_dir).create_final()
or using the provided wrapper function:
create_manifest(d, False, manifest_dir) -> creates initial manifest
create_manifest(d, True, manifest_dir) -> creates final manifest
If manifest_dir argument is ommited, it defaults to ${WORKDIR}.
NOTE: this commit creates fixed manifests for minimal/sato/sato-sdk
images, for Rpm & Opkg backends, in order to help speed up
development of rootfs refactoring. Dpkg initial manifest creation is
implemented.
