use getprime_mt() in tests/utils/test_roots_mod.c
use getprime_mt() in tests/utils/test_roots_mod.c

mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs