givaro: fix clang build

Usage of `std::bool_constant` prevents compilation using Clang; see
https://github.com/linbox-team/givaro/issues/225

pkgs/development/libraries/givaro/default.nix

···
       url = "https://github.com/linbox-team/givaro/commit/c7744bb133496cd7ac04688f345646d505e1bf52.patch";
       hash = "sha256-aAA5o8Va10v0Pqgcpx7qM0TAZiNQgXoR6N9xecj7tDA=";
     })
+    (fetchpatch {
+      name = "clang-16.patch";
+      url = "https://github.com/linbox-team/givaro/commit/a81d44b3b57c275bcb04ab00db79be02561deaa2.patch";
+      hash = "sha256-sSk+VWffoEjZRTJcHRISLHPyW6yuvI1u8knBOfxNUIE=";
+    })
   ];
 
   enableParallelBuilding = true;