autoconf: update to 2.72 (#7031)

packages/a/autoconf/xmake.lua

@@ -11,6 +11,7 @@ package("autoconf")
     add_versions("2.68", "eff70a2916f2e2b3ed7fe8a2d7e63d72cf3a23684b56456b319c3ebce0705d99")
     add_versions("2.69", "954bd69b391edc12d6a4a51a2dd1476543da5c6bbf05a95b59dc0dd6fd4c2969")
     add_versions("2.71", "431075ad0bf529ef13cb41e9042c542381103e80015686222b8a9d4abef42a1c")
+    add_versions("2.72", "afb181a76e1ee72832f6581c0eddf8df032b83e2e0239ef79ebedc4467d92d6e")
 
     if is_host("linux") then
         add_extsources("apt::autoconf")