s/target/buildtarget/ in projectnodes

This is in preparation of the addition of "targets" in the sense
of "platforms to develop for" into the codebase.

Reviewed-by: dt

src/plugins/genericprojectmanager/genericprojectnodes.cpp

@@ -162,7 +162,7 @@ ProjectExplorer::FolderNode *GenericProjectNode::findOrCreateFolderByName(const
     return findOrCreateFolderByName(components, components.length());
 }
 
-bool GenericProjectNode::hasTargets() const
+bool GenericProjectNode::hasBuildTargets() const
 {
     return true;
 }