qitoolchain.qipackage.install: improve docstring
qitoolchain.qipackage.install: improve docstring

Change-Id: If5c19b4ae8f863fd5879444b1f985cac659e023e
Reviewed-on: http://gerrit.aldebaran.lan/57954
Tested-by: gerrit
Reviewed-by: dmerejkowsky <1e4b13000fa8777df4cefd2fd8215187e3deb062@aldebaran-robotics.com>
Tested-by: dmerejkowsky <1e4b13000fa8777df4cefd2fd8215187e3deb062@aldebaran-robotics.com>

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