:art: merge ast's master's makefile

diff --git a/ast b/ast
index ff31aff0f531c0bcf4a8ed9e04bedd0a1eefe9ba..dc4e477f0be36712aebefe9ed3c0f06fcffd80d1 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit ff31aff0f531c0bcf4a8ed9e04bedd0a1eefe9ba
+Subproject commit dc4e477f0be36712aebefe9ed3c0f06fcffd80d1