Signature mismatch for crypto_strongest_rand() in ed-donna code breaks -flto compilation
```
./src/lib/crypt_ops/crypto_rand.h:24:1: error: variable ‘crypto_strongest_rand’ redeclared as function
MOCK_DECL(void,crypto_strongest_rand,(uint8_t *out, size_t out_len));
^
./src/lib/crypt_ops/crypto_rand.h:24:1: error: variable ‘crypto_strongest_rand’ redeclared as function
src/lib/crypt_ops/crypto_rand.c:338:1: note: previously declared here
MOCK_IMPL(void,
^
```
issue