[DEBUG] wifi_network: read only 1 byte in internal fifo
[DEBUG] wifi_network: read only 1 byte in internal fifo

To unlock thread, we write one byte in pipe, so we juste need to read
one byte. Otherwise this call could block wainting for the next 9 bytes
on some buggy/exotic platform like PSP.

Change-Id: Ia725a31b4359fe7470fe873343b3f87a097eb19c

kradhub/libARNetworkAL,kradhub/libARNetworkAL,Parrot-Developers/libARNetworkAL,Parrot-Developers/libARNetworkAL,kradhub/libARNetworkAL,Parrot-Developers/libARNetworkAL,Parrot-Developers/libARNetworkAL