submodules: update clippy from e3cb40e to a9f8d3a

Changes:
````
Remove unused import
rustup rust-lang#61995
Fix allow bug in `trivially_copy_pass_by_ref`
readme: fix urls in the license
Fix `match_same_arms` false negative
Reenable cargo and rls tests in travis
Test for melted ICE rust-lang#4121
Fix `never_loop` false positive
Running rustfmt on test
Removed use of intrinsics::uninit from tests.
Making try_err machine applicable
PR comments
Adding try_err lint
````

Fixes rust-lang#62338

Author: matthiaskrgr