Use the gospel file in examples

This only tests the `qcheck-stm` plugin, but it was also the only one
modified with this new feature.

examples/dune

@@ -8,6 +8,13 @@
   (:standard -w -69))
  (package ortac-examples))
 
+(rule
+ (alias runtest)
+ (package ortac-examples)
+ (targets lwt_dllist_spec.gospel)
+ (action
+  (run %{bin:gospel} check %{dep:lwt_dllist_spec.mli})))
+
 (rule
  (alias runtest)
  (mode promote)
@@ -25,7 +32,7 @@
     (run
      ortac
      qcheck-stm
-     %{dep:lwt_dllist_spec.mli}
+     %{dep:lwt_dllist_spec.gospel}
      "create ()"
      "int t"
      --include=lwt_dllist_incl
@@ -67,6 +74,13 @@
  (libraries varray)
  (package ortac-examples))
 
+(rule
+ (alias runtest)
+ (package ortac-examples)
+ (targets varray_spec.gospel)
+ (action
+  (run %{bin:gospel} check %{dep:varray_spec.mli})))
+
 (rule
  (mode promote)
  (alias runtest)
@@ -84,7 +98,7 @@
     (run
      ortac
      qcheck-stm
-     %{dep:varray_spec.mli}
+     %{dep:varray_spec.gospel}
      "make 42 'a'"
      "char t"
      --include=varray_incl
@@ -107,6 +121,13 @@
 (rule
  (copy varray_spec.mli varray_circular_spec.mli))
 
+(rule
+ (alias runtest)
+ (package ortac-examples)
+ (targets varray_circular_spec.gospel)
+ (action
+  (run %{bin:gospel} check %{dep:varray_circular_spec.mli})))
+
 (library
  (name varray_circular_spec)
  (modules varray_circular_spec)
@@ -130,7 +151,7 @@
     (run
      ortac
      qcheck-stm
-     %{dep:varray_circular_spec.mli}
+     %{dep:varray_circular_spec.gospel}
      "make 42 'a'"
      "char t"
      --include=varray_incl