Adapt to new rustc

Author: mgr-inz-rafal

clippy_lints/src/modulo_arithmetic.rs

@@ -1,10 +1,11 @@
 use crate::consts::{constant, Constant};
 use crate::utils::{sext, span_help_and_lint};
 use if_chain::if_chain;
+use rustc::declare_lint_pass;
 use rustc::hir::*;
 use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
 use rustc::ty::{self};
-use rustc::{declare_lint_pass, declare_tool_lint};
+use rustc_session::declare_tool_lint;
 
 declare_clippy_lint! {
     /// **What it does:** Checks for modulo arithemtic.