testing/guile-gnutls: fails to build on riscv64
guile-gnutls fails to build with:
enum-map.i.c: In function 'scm_gnutls_connection_flag_to_c_string':
enum-map.i.c:333:10: error: 'GNUTLS_NO_EXTENSIONS' undeclared (first use in this function); did you mean 'GNUTLS_EXT_NONE'?
333 | { GNUTLS_NO_EXTENSIONS, "no-extensions" },
| ^~~~~~~~~~~~~~~~~~~~
| GNUTLS_EXT_NONE
enum-map.i.c:333:10: note: each undeclared identifier is reported only once for each function it appears in
In file included from /usr/include/guile/3.0/libguile/threads.h:29,
from /usr/include/guile/3.0/libguile/async.h:25,
from /usr/include/guile/3.0/libguile.h:35,
from core.c:32:
enum-map.i.c: In function 'scm_gnutls_define_enums':
enum-map.i.c:2205:78: error: 'GNUTLS_NO_EXTENSIONS' undeclared (first use in this function); did you mean 'GNUTLS_EXT_NONE'?