Auto merge of #65904 - matthiaskrgr:submodule_upd, r=Manishearth
Auto merge of #65904 - matthiaskrgr:submodule_upd, r=Manishearth

submodules: update clippy from 66df92ae to c8e3cfbd

Changes:
````
travis: temporarily disable rustfmt ci check until #4742 is resolved
rustup https://github.com/rust-lang/rust/pull/65792/
Fix ICE #4579
Add regression test for ICE #4579
Run update_lints for Unicode lint
Re-add false positive check
Add raw string regression test for useless_format lint
Re-factor useless_format lint
Update Unicode lint tests
[Backported] Rustup to https://github.com/rust-lang/rust/pull/59545
````

Fixes #65888

r? @oli-obk @Manishearth

graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust