fix enum definitions of hauler_type

while implementing the --hauler-type param for the prioritize script, I
noticed that the job->item_subtype field, which is tagged as being a
hauler_type enum, did not match up with the type of item being hauled. I
fixed this enum based on observation of which enum values resulted in
which types of items were hauled.

I was unabled to verify the "Bin" enum. I could not get any hauling jobs
of this type to be generated in my fort, even when explicitly building
bins and enabling bins for stockpiles.

df.stockpile.xml

@@ -3,13 +3,13 @@
         <enum-item name='Any'/>
         <enum-item name='Stone'/>
         <enum-item name='Wood'/>
-        <enum-item name='Item'/>
-        <enum-item name='Bin'/>
         <enum-item name='Body'/>
         <enum-item name='Food'/>
         <enum-item name='Refuse'/>
+        <enum-item name='Item'/>
         <enum-item name='Furniture'/>
         <enum-item name='Animal'/>
+        <enum-item name='Bin'/>
     </enum-type>
 
     <enum-type type-name='furniture_type'>