Bug#887577: ocamlnet FTBFS with nettle 3.4-1

[Adrian Bunk <bunk@debian.org>]

Source: ocamlnet
Version: 4.1.2-2
Severity: serious

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/ocamlnet.html

...
In file included from nettls_nettle_bindings_stubs.c:24:0:
nettls_nettle_bindings_stubs.c:120:36: error: 'nettle_get_ciphers' declared as function returning an array
 const struct nettle_cipher * const nettle_ciphers[] = {
                                    ^
nettls_nettle_bindings_stubs.c:120:14: error: function 'nettle_get_ciphers' is initialized like a variable
 const struct nettle_cipher * const nettle_ciphers[] = {
              ^~~~~~~~~~~~~
In file included from nettls_nettle_bindings_stubs.c:24:0:
nettls_nettle_bindings_stubs.c:120:36: error: conflicting types for 'nettle_get_ciphers'
 const struct nettle_cipher * const nettle_ciphers[] = {
                                    ^
/usr/include/nettle/nettle-meta.h:73:1: note: previous declaration of 'nettle_get_ciphers' was here
 nettle_get_ciphers (void);
 ^~~~~~~~~~~~~~~~~~
nettls_nettle_bindings_stubs.c:121:3: error: invalid initializer
   &nettle_aes128,
   ^