test: enable tests using v, ok := <-ch syntax

R=rsc, r
CC=golang-dev
https://golang.org/cl/4290059
diff --git a/test/fixedbugs/bug069.go b/test/fixedbugs/bug069.go
index bf73163..9038387 100644
--- a/test/fixedbugs/bug069.go
+++ b/test/fixedbugs/bug069.go
@@ -7,15 +7,14 @@
 package main
 
 func main() {
-	//TODO(rsc): uncomment when this syntax is valid for receive+check closed
-	//	c := make(chan int);
-	//	ok := false;
-	//	var i int;
-	//
-	//	i, ok = <-c;  // works
-	//	_, _ = i, ok;
-	//
-	//	ca := new([2]chan int);
-	//	i, ok = <-(ca[0]);  // fails: c.go:11: bad shape across assignment - cr=1 cl=2
-	//	_, _ = i, ok;
+	c := make(chan int);
+	ok := false;
+	var i int;
+	
+	i, ok = <-c;  // works
+	_, _ = i, ok;
+	
+	ca := new([2]chan int);
+	i, ok = <-(ca[0]);  // fails: c.go:11: bad shape across assignment - cr=1 cl=2
+	_, _ = i, ok;
 }