mv std libs to library/

library/std/src/sys/windows/stack_overflow_uwp.rs

@@ -0,0 +1,13 @@
+#![cfg_attr(test, allow(dead_code))]
+
+pub struct Handler;
+
+impl Handler {
+    pub fn new() -> Handler {
+        Handler
+    }
+}
+
+pub unsafe fn init() {}
+
+pub unsafe fn cleanup() {}