Binary domination removes arch-all binaries too soon

[Malcolm Cleaton]

From the XXX in domination.py, _judgeSuperseded:

        # XXX: dsilvers: 20050922: Need to make binaries go in groups
        # but for now this'll do. An example of the concrete problem here
        # is:
        # - Upload foo-1.0, which builds foo and foo-common (arch all).
        # - Upload foo-1.1, ditto.
        # - foo-common-1.1 is built (along with the i386 binary for foo)
        # - foo-common-1.0 is superseded
        # Foo is now uninstallable on any architectures which don't yet
        # have a build of foo-1.1, as the foo-common for foo-1.0 is gone.

This causes packages to be uninstallable for a period of time, which is bad.

[Robert Collins (lifeless)]

This is a dupe of a newer, escalted bug whose number escapes me. Sorry for the lack of memory, but if you are interested you can search for it :)