submodules: update clippy from b029042 to 164310d

Changes:
````
Lint
Fix float_cmp false positive when comparing signum
grep only lines, that start with 'changelog: '
Get PR number from bors commit message
Authenticate with github_api_token
Check PRs for changelog entry in the body
Deny warnings in CI
Disable dogfood on windows for faster build time on travis
Revert "Remove `CARGO_INCREMENTAL=0` from windows build"
Remove `CARGO_INCREMENTAL=0` from windows build
Test with different sysroots dependent on the OS
Build sys_root in driver with PathBuf instead of String
Don't re-set the LD_LIBRARY_PATH in base_tests.sh
Add master toolchain binaries to the PATH
Change conditional
Stop allowing failures in Travis windows build
Fix bug in `implicit_hasher` causing crashes
Avoid rustfmt bug on Windows
Add rustfmt nightly to appveyor install
Work around rustup fallback error on Windows
Update documentation to the dev fmt command
Remove format checks from CI scripts again.
Remove format checks from CI script
Improve fmt test failure message
Fix crash on `dev --limit-stderr-length`
Add dev fmt subcommand
don't strip blank lines in lint documentation
````

Author: matthiaskrgr