Merge pull request #2124 from robashton/master

de-duplicate dependency list in rebar_compiler_erl.erl

src/rebar_compiler_erl.erl

@@ -255,7 +255,7 @@ parse_attrs(Fd, Includes, Dir) ->
                     parse_attrs(Fd, Includes, Dir)
             end;
         {eof, _} ->
-            Includes;
+            lists:usort(Includes);
         _Err ->
             parse_attrs(Fd, Includes, Dir)
     end.