qipy: add sourceme
qipy: add sourceme

Mostly useful in scripts

 source $(qibuild sourceme)

Change-Id: I007b0d1ada4c2f75bb9d83f56ba8b036e3ad5533

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