Add various missing includes

src/linkgraph/demands.h

@@ -4,6 +4,7 @@
 #define DEMANDS_H
 
 #include "linkgraphjob_base.h"
+#include <vector>
 
 /**
  * Calculate the demands. This class has a state, but is recreated for each

src/linkgraph/linkgraph.h

@@ -19,6 +19,7 @@
 #include "linkgraph_type.h"
 #include "../3rdparty/cpp-btree/btree_map.h"
 #include <utility>
+#include <vector>
 
 class LinkGraph;
 

src/linkgraph/linkgraphschedule.h

@@ -13,6 +13,7 @@
 #include "../thread.h"
 #include "linkgraph.h"
 #include <memory>
+#include <vector>
 
 class LinkGraphJob;