#63 Function am_big_endian not needed

[mike]

Basically [#36] was intended to wipe out the runtime endianess check in VOS. Finally in trdp_utils.c there is a similar functionality existent by the function am_big_endian().
The function shall get deleted in favor of using the compile time settings mentioned in [Endianess] and [#36]

[mike]

Updated trdp_utils c+h to wipe out this function. Now everything should run purely compile time defined, saving some CPU cycles.

Done in [r1331]