oe/rootfs.py: DpkgRootfs/OpkgRootfs add support for dependency handling in postinsts scripts.
The old code don't take into account package dependencies causing
undefined execution order in postinsts scripts, in order to fix:
Add DpkgOpkgRootfs class for store common operations in DpkgRootfs
and OpkgRootfs.
Add _get_delayed_postinsts_common method that process Depends from
status file in dpkg/opkg and resolve dependency order causing an
execption if found circular dependencies.
[YOCTO #5318]
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
