CMake: Even less indirection

Change-Id: If9990f81e4150802dd08e0fc17a1faceb32e0cc6
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp

@@ -1323,7 +1323,7 @@ void CMakeBuildSystem::updateInitialCMakeExpandableVars()
     }
 
     if (!config.isEmpty())
-        emit cmakeBuildConfiguration()->configurationChanged(config);
+        emit configurationChanged(config);
 }
 
 } // namespace Internal