Cross Reference: /external/nanopb-c/tests/callbacks

`Name`	`Date`	`Size`
Up to higher level directory
`callbacks.proto`	21-Aug-2018	`425`
`decode_callbacks.c`	21-Aug-2018	`3K`
`encode_callbacks.c`	21-Aug-2018	`2.5K`
`SConscript`	21-Aug-2018	`479`