Fix missing post compile hook

rebar.config

@@ -38,8 +38,5 @@
     verbose
 ]}.
 
-{provider_hooks,
- [{pre, [
-    {compile, {pc, compile}},
-    {clean, {pc, clean}}
-  ]}]}.
+{provider_hooks, [{pre, [{compile, {pc, compile}}]},
+                  {post, [{compile, {pc, clean}}]}]}.