file-transfer.py: pass byte_arrays=True to {Accept,Provide}File
file-transfer.py: pass byte_arrays=True to {Accept,Provide}File

The unix socket address is supposed to be an 'ay' and not a 's'
according to the spec. This change make the script works with both so it
can be used with old bugged CM's and new ones.

max-posedon/telepathy-python,detrout/telepathy-python,epage/telepathy-python,freedesktop-unofficial-mirror/telepathy__telepathy-python,PabloCastellano/telepathy-python,freedesktop-unofficial-mirror/telepathy__telepathy-python,epage/telepathy-python,PabloCastellano/telepathy-python,max-posedon/telepathy-python,detrout/telepathy-python