Add default make binary to use

rebar.config

@@ -14,7 +14,7 @@
  ]}.
 {escript_main_app, setup}.
 {escript_name, setup_gen}.
-{post_hooks, [{compile, "${MAKE} escriptize"}]}.
+{post_hooks, [{compile, "${MAKE:-make} escriptize"}]}.
 
 %% This line is to ensure that any erl_first_files setting from
 %% 'above' isn't accidentally inherited, since there seems to be