qitoolchain tutorial: add a 'target' attribute
qitoolchain tutorial: add a 'target' attribute

Change-Id: I2593758f789d002b2dbc11106d34263e946df728
Reviewed-on: http://gerrit.aldebaran.lan/56099
Tested-by: gerrit
Reviewed-by: dmerejkowsky <1e4b13000fa8777df4cefd2fd8215187e3deb062@aldebaran-robotics.com>

dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,aldebaran/qibuild,aldebaran/qibuild