Squish: Added warning about unusable targets

Change-Id: I2796aaf40d0ffcf89aca085afdc685f57e1b4f76
Reviewed-by: Christian Stenger <christian.stenger@nokia.com>

tests/system/shared/project.py

@@ -254,7 +254,9 @@ def __chooseTargets__(targets=QtQuickConstants.Targets.DESKTOP):
                           mustCheck)
         except LookupError:
             if mustCheck:
-                test.fail("Failed to check target '%s'" % QtQuickConstants.getStringForTarget(current))
+                test.fail("Failed to check target '%s'." % QtQuickConstants.getStringForTarget(current))
+            else:
+                test.warning("Target '%s' is not set up correctly." % QtQuickConstants.getStringForTarget(current))
 
 # run and close an application
 # withHookInto - if set to True the function tries to attach to the sub-process instead of simply pressing Stop inside Creator