qbs build: Soft dependency on LicenseChecker.

Change-Id: Ibb1f4ee5996306fe24df72b0cf16d5652a76bc57
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

plugins/autotest/autotest.qbs

 import qbs
 
-QtcPlugin {
+QtcCommercialPlugin {
     name: "AutoTest"
 
     Depends { name: "Core" }
     Depends { name: "CppTools" }
     Depends { name: "CPlusPlus" }
-    Depends { name: "LicenseChecker" }
     Depends { name: "ProjectExplorer" }
     Depends { name: "QmakeProjectManager" }
     Depends { name: "QmlJS" }