migration: Split vmstate-types.c from vmstate.c

Now one just has the interperter, and the other has the basic types.
Once there, add copyright boilerplate.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

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Use GPL v2 or later.  Detected by David.
4 files changed