qibuild.command: make it possible to make some stats
qibuild.command: make it possible to make some stats

usage:

  qibuild.command.CONFIG["stats"] = True

   # some other code

  stats = qibuild.command.STATS

Yeah, it's all done with global variables.

Change-Id: I28d6e2c424ea521af78bf910907f94482ce34aa4
Reviewed-on: http://gerrit.aldebaran.lan:8080/2267
Reviewed-by: dmerejkowsky <1e4b13000fa8777df4cefd2fd8215187e3deb062@aldebaran-robotics.com>
Tested-by: dmerejkowsky <1e4b13000fa8777df4cefd2fd8215187e3deb062@aldebaran-robotics.com>

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