adaptor → boost Relation

File in msgpack/adaptor	Includes file in msgpack/v1/adaptor/boost
boost / fusion.hpp	fusion.hpp
boost / msgpack_variant.hpp	msgpack_variant.hpp
boost / msgpack_variant_decl.hpp	msgpack_variant_decl.hpp
boost / optional.hpp	optional.hpp
boost / string_ref.hpp	string_ref.hpp
boost / string_view.hpp	string_view.hpp