bug#48520: rav1e 0.3.5 is not reproducible

[Bone Baboon]

`guix describe` outputs:

```
Generation 24   May 12 2021 18:06:24    (current)
  guix d6aeebb
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: d6aeebb23639258311fdfb9dbf5f903079fde51a
```

`guix challenge /gnu/store/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5`
outputs:

```
/gnu/store/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5 contents differ:
  local hash: 0lr47rfaq41yn3sbf86xnwpsrgvi38ifi3hx5dz3cm5iinfwaxc0
  
https://ci.guix.gnu.org/nar/lzip/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5: 
17g58f754k0n5hwiysb88cz9fg82di2j244zzh9mnv6a172y4xjb
  differing file:
    /share/cargo/registry/rav1e-0.3.5.crate

1 store items were analyzed:
  - 0 (0.0%) were identical
  - 1 (100.0%) differed
  - 0 (0.0%) were inconclusive
```

`guix challenge --diff=diffoscope
/gnu/store/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5` outputs:

```
/gnu/store/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5 contents differ:
  local hash: 0lr47rfaq41yn3sbf86xnwpsrgvi38ifi3hx5dz3cm5iinfwaxc0
  
https://ci.guix.gnu.org/nar/lzip/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5: 
17g58f754k0n5hwiysb88cz9fg82di2j244zzh9mnv6a172y4xjb
--- /tmp/guix-directory.3zSn14
+++ /gnu/store/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5
│   --- /tmp/guix-directory.3zSn14/share
├── +++ /gnu/store/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5/share
│ │   --- /tmp/guix-directory.3zSn14/share/cargo
│ ├── +++ /gnu/store/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5/share/cargo
│ │ │   --- /tmp/guix-directory.3zSn14/share/cargo/registry
│ │ ├── +++ 
/gnu/store/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5/share/cargo/registry
│ │ │ │   --- /tmp/guix-directory.3zSn14/share/cargo/registry/rav1e-0.3.5.crate
│ │ │ ├── +++ 
/gnu/store/cdhgn2y3xzmbxfzkzzlm9fb7q70paxvz-rav1e-0.3.5/share/cargo/registry/rav1e-0.3.5.crate
│ │ │ │ ├── rav1e-0.3.5.crate-content
│ │ │ │ │ ├── file list
│ │ │ │ │ │ @@ -1,9 +1,9 @@
│ │ │ │ │ │ --rw-r--r--   0        0        0    39196 2021-04-03 
18:35:22.000000 rav1e-0.3.5/Cargo.lock
│ │ │ │ │ │ --rw-r--r--   0        0        0     4228 2021-04-03 
18:35:22.000000 rav1e-0.3.5/Cargo.toml
│ │ │ │ │ │ +-rw-r--r--   0        0        0    39196 2021-04-21 
15:38:10.000000 rav1e-0.3.5/Cargo.lock
│ │ │ │ │ │ +-rw-r--r--   0        0        0     4228 2021-04-21 
15:38:10.000000 rav1e-0.3.5/Cargo.toml
│ │ │ │ │ │  -rw-r--r--   0      999    30000     4228 2020-12-31 
14:44:40.000000 rav1e-0.3.5/Cargo.toml.orig
│ │ │ │ │ │  -rw-r--r--   0      999    30000     1332 2020-11-16 
12:40:01.000000 rav1e-0.3.5/LICENSE
│ │ │ │ │ │  -rw-r--r--   0      999    30000     5702 2017-09-24 
10:10:31.000000 rav1e-0.3.5/PATENTS
│ │ │ │ │ │  -rw-r--r--   0      999    30000     5820 2020-12-31 
12:00:53.000000 rav1e-0.3.5/README.md
│ │ │ │ │ │  -rw-r--r--   0      999    30000     4333 2020-12-31 
12:00:53.000000 rav1e-0.3.5/build.rs
│ │ │ │ │ │  -rw-r--r--   0      999    30000      423 2020-12-31 
12:00:53.000000 rav1e-0.3.5/cbindgen.toml
│ │ │ │ │ │  -rw-r--r--   0      999    30000     3579 2020-12-31 
12:00:53.000000 rav1e-0.3.5/src/activity.rs

1 store items were analyzed:
  - 0 (0.0%) were identical
  - 1 (100.0%) differed
  - 0 (0.0%) were inconclusive
```