random: Extend semantics of _gcry_random_close_fds.
* random/random-csprng.c (_gcry_rngcsprng_close_fds): Add de-initialization. * random/random-drbg.c (_gcry_rngdrbg_close_fds): Likewise.
- GnuPG-bug-id: T5636
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>