libgo: use Windows line endings in testwinsignal

libgo/go/runtime/testdata/testwinsignal/main.go

@@ -1,19 +1,19 @@
-package main
-
-import (
-	"fmt"
-	"os"
-	"os/signal"
-	"time"
-)
-
-func main() {
-	c := make(chan os.Signal, 1)
-	signal.Notify(c)
-
-	fmt.Println("ready")
-	sig := <-c
-
-	time.Sleep(time.Second)
-	fmt.Println(sig)
-}
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"time"
+)
+
+func main() {
+	c := make(chan os.Signal, 1)
+	signal.Notify(c)
+
+	fmt.Println("ready")
+	sig := <-c
+
+	time.Sleep(time.Second)
+	fmt.Println(sig)
+}