std: win: Disable stack overflow handling on UWP

The required functions are not available, so hope for the best

src/libstd/sys/windows/mod.rs

@@ -33,16 +33,18 @@ pub mod pipe;
 pub mod process;
 pub mod rand;
 pub mod rwlock;
-pub mod stack_overflow;
 pub mod thread;
 pub mod thread_local;
 pub mod time;
 cfg_if::cfg_if! {
     if #[cfg(not(target_vendor = "uwp"))] {
         pub mod stdio;
+        pub mod stack_overflow;
     } else {
         pub mod stdio_uwp;
+        pub mod stack_overflow_uwp;
         pub use self::stdio_uwp as stdio;
+        pub use self::stack_overflow_uwp as stack_overflow;
     }
 }