buildroot

samba: Remove execution rights from smb.conf

/etc/samba/smb.conf should be installed without execution rights since it is a
simple text configuration file.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>