Fix ambiguous import of marker::Atomic crate

The problem is that Atomic is being imported from two different places:

As a type alias from sync::atomic::*
As a trait from crate::marker::*

This creates ambiguity when the code tries to use T: Atomic + PartialEq as a trait bound.
adds explicit imports to radium-1.1.0/src/lib.rs

Fixes
error[E0404]: expected trait, found type alias `Atomic`
error[E0659]: `Atomic` is ambiguous 

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

Index: radium-1.1.0/src/lib.rs
===================================================================
--- radium-1.1.0.orig/src/lib.rs
+++ radium-1.1.0/src/lib.rs
@@ -12,6 +12,8 @@ use core::{
 };
 
 use crate::marker::*;
+use crate::marker::Atomic as AtomicTrait;
+
 pub use crate::types::{
 	Atom,
 	Isotope,
@@ -801,7 +803,7 @@ radium! {
 
 unsafe impl<T> Radium for Atom<T>
 where
-	T: Atomic + PartialEq,
+	T: AtomicTrait + PartialEq,
 	T::Atom: Radium<Item = T>,
 {
 	type Item = T;