Promote probe.reference again

(cherry picked from commit 2284054)

Author: mshinwell

.vscode/settings.json

@@ -7,6 +7,7 @@
                 "*.mlp": "ocaml",
                 "smmintrin.h": "c",
                 "tmmintrin.h": "c",
-                "pmmintrin.h": "c"
+                "pmmintrin.h": "c",
+                "*.tbl": "c"
         }
-}
+}

ocaml/testsuite/tests/typing-layouts-err-msg/probe.reference

@@ -1,9 +1,9 @@
-File "probe.ml", line 12, characters 6-7:
+File "probe.ml", line 13, characters 6-7:
 13 |   let f () = x in
            ^
 Warning 26 [unused-var]: unused variable f.
 
-File "probe.ml", lines 11-14, characters 20-2:
+File "probe.ml", lines 12-15, characters 20-2:
 12 | ....................[%probe "a" (
 13 |   let f () = x in
 14 |   ()