Auto merge of rust-lang#92465 - matthiaskrgr:rollup-yuary84, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#90383 (Extend check for UnsafeCell in consts to cover unions)
 - rust-lang#91375 (config.rs: Add support for a per-target default_linker option.)
 - rust-lang#91480 (rustdoc: use smaller number of colors to distinguish items)
 - rust-lang#92338 (Add try_reserve and  try_reserve_exact for OsString)
 - rust-lang#92405 (Add a couple needs-asm-support headers to tests)
 - rust-lang#92435 (Sync rustc_codegen_cranelift)
 - rust-lang#92440 (Fix mobile toggles position)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

compiler/rustc_codegen_cranelift/.github/workflows/main.yml

@@ -5,6 +5,21 @@ on:
   - pull_request
 
 jobs:
+  rustfmt:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install rustfmt
+      run: |
+        rustup component add rustfmt
+
+    - name: Rustfmt
+      run: |
+        cargo fmt --check
+
   build:
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60

compiler/rustc_codegen_cranelift/.github/workflows/nightly-cranelift.yml

@@ -3,7 +3,7 @@ name: Test nightly Cranelift
 on:
   push:
   schedule:
-    - cron: '1 17 * * *' # At 01:17 UTC every day.
+    - cron: '17 1 * * *' # At 01:17 UTC every day.
 
 jobs:
   build: