jsondoclint: False Positive when `use`ing enum variants

[aDotInTheVoid]

jsondoclint currently believes that the item kind's that can appear behind a use are the same as the items that can appear in a mod.

This isn't true, eg

#![feature(no_core)]
#![no_core]

pub enum AlwaysNone {
    None,
}

pub use AlwaysNone::None;

Produces (abridged)

{
  "index": {
    "0:0:1566": {
      "id": "0:0:1566",
      "inner": {"is_crate": true, "is_stripped": false, "items": ["0:1:1565", "0:4"]},
      "kind": "module",
      "name": "use_variant"
    },
    "0:1:1565": {
      "id": "0:1:1565",
      "inner": {"generics": {"params": [], "where_predicates": []}, "impls": [], "variants": ["0:2:173"], "variants_stripped": false},
      "kind": "enum",
      "name": "AlwaysNone"
    },
    "0:2:173": {
      "id": "0:2:173",
      "inner": {"variant_inner": null, "variant_kind": "plain"},
      "kind": "variant",
      "name": "None"
    },
    "0:4": {
      "id": "0:4",
      "inner": {"glob": false, "id": "0:2:173", "name": "None", "source": "AlwaysNone::None"},
      "kind": "import",
      "name": null
    }
  },
  "root": "0:0:1566"
}

Causing error

---- [rustdoc-json] src/test/rustdoc-json/enums/use_variant.rs stdout ----

error: jsondoclint failed!
status: exit status: 1
command: "/home/nixon/dev/rust/rust/build/x86_64-unknown-linux-gnu/stage0-tools-bin/jsondoclint" "/home/nixon/dev/rust/rust/build/x86_64-unknown-linux-gnu/test/rustdoc-json/enums/use_variant/use_variant.json"
stdout: none
--- stderr -------------------------------
0:2:173: Expected Module inner item but found Variant (found at ["$.index[\"0:1:1565\"].inner.variants[0]", "$.index[\"0:2:173\"].id", "$.index[\"0:4\"].inner.id"])
Error: Errors validating json /home/nixon/dev/rust/rust/build/x86_64-unknown-linux-gnu/test/rustdoc-json/enums/use_variant/use_variant.json
------------------------------------------

A similar case occors for glob importing enums

#![feature(no_core)]
#![no_core]

pub enum Color {
    Red,
    Green,
    Blue,
}

pub use Color::*;

{
  "crate_version": null,
  "external_crates": {},
  "format_version": 23,
  "includes_private": false,
  "index": {
    "0:0:1569": {
      "id": "0:0:1569",
      "inner": {"is_crate": true, "is_stripped": false, "items": ["0:1:1565", "0:8"]},
      "kind": "module",
      "name": "use_glob",
      "visibility": "public"
    },
    "0:1:1565": {
      "id": "0:1:1565",
      "inner": {
        "variants": ["0:2:1566", "0:4:1567", "0:6:1568"]
      },
      "kind": "enum",
      "name": "Color",
      "visibility": "public"
    },
    "0:2:1566": {
      "id": "0:2:1566",
      "inner": {"variant_inner": null, "variant_kind": "plain"},
      "kind": "variant",
      "name": "Red",
      "visibility": "default"
    },
    "0:4:1567": {
      "id": "0:4:1567",
      "inner": {"variant_inner": null, "variant_kind": "plain"},
      "kind": "variant",
      "name": "Green",
      "visibility": "default"
    },
    "0:6:1568": {
      "id": "0:6:1568",
      "inner": {"variant_inner": null, "variant_kind": "plain"},
      "kind": "variant",
      "name": "Blue",
      "visibility": "default"
    },
    "0:8": {
      "id": "0:8",
      "inner": {"glob": true, "id": "0:1:1565", "name": "Color", "source": "Color"},
      "kind": "import",
      "name": null,
      "visibility": "public"
    }
  },
  "root": "0:0:1569"
}

errors with

---- [rustdoc-json] src/test/rustdoc-json/enums/use_glob.rs stdout ----

error: jsondoclint failed!
status: exit status: 1
command: "/home/nixon/dev/rust/rust/build/x86_64-unknown-linux-gnu/stage0-tools-bin/jsondoclint" "/home/nixon/dev/rust/rust/build/x86_64-unknown-linux-gnu/test/rustdoc-json/enums/use_glob/use_glob.json"
stdout: none
--- stderr -------------------------------
0:1:1565: Expected Module but found Enum
Error: Errors validating json /home/nixon/dev/rust/rust/build/x86_64-unknown-linux-gnu/test/rustdoc-json/enums/use_glob/use_glob.json
------------------------------------------

@rustbot modify labels: +A-rustdoc-json +A-testsuite +T-rustdoc

@rustbot claim