gnatprove: mute warnings about type conversion for aarch64

--- a/src/counterexamples/ce_parsing.adb	2025-03-14 21:48:15.657409808 +0100

+++ b/src/counterexamples/ce_parsing.adb	2025-03-14 22:04:32.114664704 +0100

@@ -975,6 +975,9 @@

                elsif Is_Extended_Precision_Floating_Point_Type (Ty) then

                   pragma Assert (Size (Exp) = 15);

                   pragma Assert (Size (Significand) = 63);

+                  pragma Warnings (Off, "assertion will fail at run time");

+                  pragma Warnings (Off,

+                      "types for unchecked conversion have different sizes");

                   declare

                      package P is new Parse_Conversion

                        (Interfaces.Unsigned_128, Long_Long_Float);

@@ -983,6 +986,9 @@

                   begin

                      return (Float_K, (Extended_K, F));

                   end;

+                  pragma Warnings (On,

+                      "types for unchecked conversion have different sizes");

+                  pragma Warnings (On, "assertion will fail at run time");

                else

                   raise Program_Error;

                end if;

      patches = [

        # Disable Coq related targets which are missing in the fsf-14 branch

        ./0001-fix-install.patch

        # Suppress warnings on aarch64: https://github.com/AdaCore/spark2014/issues/54

        ./0002-mute-aarch64-warnings.patch

      ];

      commit_date = "2024-01-11";

    };