qbs build: Soft dependency on LicenseChecker.

Change-Id: I7323dfc9fa0db6625bfd1686240d812bfaec3aa2
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

plugins/qmlprofilerextension/qmlprofilerextension.qbs

 import qbs
 
-QtcPlugin {
+QtcCommercialPlugin {
     name: "QmlProfilerExtension"
 
     Depends { name: "Core" }
-    Depends { name: "LicenseChecker" }
     Depends { name: "QmlProfiler" }
     Depends { name: "Timeline" }