fixup windows std_misc

Author: Manishearth

src/test/run-pass/issue-13259-windows-tcb-trash.rs

@@ -10,7 +10,7 @@
 
 // pretty-expanded FIXME #23616
 
-#![feature(libc)]
+#![feature(libc, std_misc)]
 
 extern crate libc;
 

src/test/run-pass/x86stdcall2.rs

@@ -10,6 +10,8 @@
 
 // pretty-expanded FIXME #23616
 
+#![feature(std_misc)]
+
 pub type HANDLE = u32;
 pub type DWORD = u32;
 pub type SIZE_T = u32;