[compilation] Turn on more warnings; make 'partial match' fatal

Summary:
The difference from default set is mostly in:
1. turning on warnings 32..39 `unused X`,
2. turning off warning 66 `unused open!` since `open! IStd` is present
in pretty much all the files.
3. Non-exhaustive pattern match is now treated as a compilation
error.

Reviewed By: ngorogiannis, mityal

Differential Revision: D19646047

fbshipit-source-id: c84ba628a

infer/src/dune.in

@@ -50,7 +50,9 @@ let infer_cflags =
     ; "-open"
     ; "InferBase"
     ; "-open"
-    ; "InferCStubs" ]
+    ; "InferCStubs"
+    ; "-w"
+    ; "+A-4@8-9-40-41-42-44-45-48-60-66" ]
 
 
 (** The build stanzas to be passed to dune *)