init using menhir for aorai parser

src/plugins/aorai/dune

@@ -47,6 +47,10 @@
 )
 
 (ocamllex yalexer)
-(ocamlyacc yaparser)
+(menhir
+  (modules yaparser)
+  ; "--fixed-exception" fixes compatibility with ocamlyacc Parsing.Parse_error
+  (flags --fixed-exception --explain --dump --comment)
+)
 
 (plugin (optional) (name aorai) (libraries frama-c-aorai.core) (site (frama-c plugins)))

src/plugins/aorai/dune-project

@@ -26,3 +26,4 @@
 
 (name frama-c-aorai)
 (using dune_site 0.1)
+(using menhir 2.1)