submodules: update clippy from 1df5766 to a3c77f6

Changes: ```` s/rustfmt-preview/rustfmt/ Swap if branches Fix c_void false positive caused by libc refactoring rustup rust-lang#56502 ( .hir -> .hir() ) typo: emum → enum Fix format. Add sysroot gettinh code to dogfood tests. Add sysroot getting code to tests. Don't try to determine sysroot. rustc_driver will use default value. Fix suggestion for multiple derefs Fix `clone_on_copy` not detecting derefs sometimes ````

Author: matthiaskrgr