ProjectTree: Change hasBuildTargets to FolderNode::showInSimpleTree

So that the resource node can override it.

Task-number: QTCREATORBUG-11678
Change-Id: Id30d1b99ee23cc18fc29fc99cf0ad7ca919ed527
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/cmakeprojectmanager/cmakeprojectnodes.cpp

@@ -37,7 +37,7 @@ CMakeProjectNode::CMakeProjectNode(const QString &fileName)
 {
 }
 
-bool CMakeProjectNode::hasBuildTargets() const
+bool CMakeProjectNode::showInSimpleTree() const
 {
     // TODO
     return true;