qisrc grep: Do not print an extra line per project when result is empty.
qisrc grep: Do not print an extra line per project when result is empty.

Change-Id: I4ad6ef6ee23830b4989417a9d382737471c66d1a
Reviewed-on: http://gerrit.aldebaran.lan:8080/10552
Reviewed-by: fmichea <e20d0674aeea681862835ac59e1fa7c309090652@aldebaran-robotics.com>
Reviewed-by: ncornu <13ba26b8f12d26c819f48749c65f2f7f5c1d13db@aldebaran-robotics.com>
Reviewed-by: dmerejkowsky <1e4b13000fa8777df4cefd2fd8215187e3deb062@aldebaran-robotics.com>
Tested-by: gerrit

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