add missing crc32 to beacon in xtce generator

[ryanpdx]

The tailing CRC32 field was missing from the XTCE generator

It is hard-coded as it is a fully generated value and not in the C3's OD

[ThirteenFish]

There's now 3 uint32 types in the generated xtce, uint32_type, uint32_s_type and uint32_B_type. Would it make sense to either consolidate them or rename this hard-coded type to be something like uint32_crc_type or just crc32_type?

Other than that this looks good.

[ryanpdx]

There's now 3 uint32 types in the generated xtce, uint32_type, uint32_s_type and uint32_B_type. Would it make sense to either consolidate them or rename this hard-coded type to be something like uint32_crc_type or just crc32_type?

The type names current follow [datatype]_type for types without units or [datatype]_[unit]_type for types with units.

The uint32_type is already shared by other fields in the beacon, I just hard-coded it to make sure it always exist for the CRC.