Support platform-endian byte order in WDT

[skliper]

LC should support numerical telemetry data types that are platform-endian. While it would be possible to get the same effect with an #if macro block, it would make the table very hard to read.

Imported from GSFCCFS-770

[skliper]

I think the concern here is only *_BE and *_LE LC_DATA types are defined. It's possible for the tlm byte order to be platform defined, in which case it would be more portable to just use the native representation.