add/clean big-endian packed structs (struct_endianess.py)
add/clean big-endian packed structs (struct_endianess.py)

Change-Id: I09c56f59631828ad219a5edd7d95cac8df462c84

osmocom/libosmo-abis,osmocom/libosmo-abis,osmocom/libosmo-abis