add infrastructure to build syspatches (binary updates to stable)

Makefile.000 corresponds to errata_000 which is nonexistent so it
is a good place to provide an example of how to build the others

add infrastructure to build syspatches (binary updates to stable)

Makefile.000 corresponds to errata_000 which is nonexistent so it
is a good place to provide an example of how to build the others

this is still work in progress, getting it in so people can join
in on the development

ok deraadt@

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