[core] [api] Support OCaml 4.08

The changes are large due to `Pervasives` deprecation:

- the `Pervasives` module has been deprecated in favor of `Stdlib`, we
  have opted for introducing a few wrapping functions in `Util` and
  just unqualified the rest of occurrences. We avoid the shims as in
  the previous attempt.

- a bug regarding partial application have been fixed.

- some formatting functions have been deprecated, but previous
  versions don't include a replacement, thus the warning has been
  disabled.

We may want to clean up things a bit more, in particular
w.r.t. modules once we can move to OCaml 4.07 as the minimum required
version.

Note that there is a clash between 4.08.0 modules `Option` and `Int`
and Coq's ones. It is not clear if we should resolve that clash or
not, see PR #10469 for more discussion.

On the good side, OCaml 4.08.0 does provide a few interesting
functionalities, including nice new warnings useful for devs.

1 files changed, 2 insertions, 2 deletions

diff --git a/checker/analyze.ml b/checker/analyze.ml
index 77e70318dd..e145988b4f 100644
--- a/checker/analyze.ml
+++ b/checker/analyze.ml
@@ -395,8 +395,8 @@ end
 module IChannel =
 struct
   type t = in_channel
-  let input_byte = Pervasives.input_byte
-  let input_binary_int = Pervasives.input_binary_int
+  let input_byte = input_byte
+  let input_binary_int = input_binary_int
 end
 
 module IString =