Fix more tests with GeneratorState rename

src/test/ui/generator/ref-escapes-but-not-over-yield.rs

@@ -10,7 +10,7 @@
 
 #![feature(generators, generator_trait)]
 
-use std::ops::{State, Generator};
+use std::ops::{GeneratorState, Generator};
 use std::cell::Cell;
 
 fn foo(x: &i32) {

src/test/ui/generator/yield-while-iterating.rs

@@ -10,7 +10,7 @@
 
 #![feature(generators, generator_trait)]
 
-use std::ops::{State, Generator};
+use std::ops::{GeneratorState, Generator};
 use std::cell::Cell;
 
 fn yield_during_iter_owned_data(x: Vec<i32>) {

src/test/ui/generator/yield-while-local-borrowed.rs

@@ -10,7 +10,7 @@
 
 #![feature(generators, generator_trait)]
 
-use std::ops::{State, Generator};
+use std::ops::{GeneratorState, Generator};
 use std::cell::Cell;
 
 fn borrow_local_inline() {

src/test/ui/generator/yield-while-ref-reborrowed.rs

@@ -10,7 +10,7 @@
 
 #![feature(generators, generator_trait)]
 
-use std::ops::{State, Generator};
+use std::ops::{GeneratorState, Generator};
 use std::cell::Cell;
 
 fn reborrow_shared_ref(x: &i32) {