Add msgpackc to the NAMES; fixes #551 #373

Job	Run time
windows-msvc-shared (CBOR)	8m 17s
windows-msvc-shared (AVRO)	7m 43s
windows-msvc-shared (JSON)	11m 53s
windows-msvc-shared (CAPNPROTO)	7m 56s
windows-msvc-shared (MSGPACK)	4m 17s
windows-msvc-shared (FLEXBUFFERS)	5m 56s
windows-msvc-shared (XML)	3m 56s
windows-msvc-shared (PARQUET)	39m 48s
windows-msvc-shared (UBJSON)	6m 40s
windows-msvc-shared (TOML)	3m 55s
windows-msvc-shared (YAML)	5m 30s
windows-msvc (JSON)	11m 37s
windows-msvc (CBOR)	8m 23s
windows-msvc (PARQUET)	31m 22s
windows-msvc (XML)	3m 42s
windows-msvc (UBJSON)	6m 58s
windows-msvc (MSGPACK)	3m 46s
windows-msvc (benchmarks)	31m 22s
windows-msvc (AVRO)	7m 33s
windows-msvc (YAML)	4m 14s
windows-msvc (CAPNPROTO)	8m 3s
windows-msvc (TOML)	4m 46s
windows-msvc (FLEXBUFFERS)	5m 10s
	3h 52m 47s

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