submodules: update clippy from 1838bfe5 to 280069dd

Changes:
````
Rustfmt all the things
Don't make decisions on values that don't represent the decision
Rustup
Actually check for constants.
formatting fix
Update clippy_lints/src/needless_bool.rs
formatting fix
needless bool lint suggestion is wrapped in brackets if it is an "else" clause of an "if-else" statement
Remove negative integer literal checks.
Fix `implicit_return` false positives.
````

1 files changed, 7 insertions, 9 deletions

diff --git a/src/tools/clippy b/src/tools/clippy
-Subproject 1838bfe5a9ff951ffd716e4632156113d95d14a
+Subproject 280069ddc750d8a20d075c76322c45d5db4a48f