fix no-longer-unsupervise test cases on windows

src/test/run-pass/foreign-no-abi.rs

@@ -1,7 +1,7 @@
 // ABI is cdecl by default
 
 extern mod rustrt {
-    fn get_task_id() -> int;
+    fn get_task_id() -> libc::intptr_t;
 }
 
 fn main() {

src/test/run-pass/issue-1251.rs

@@ -1,7 +1,7 @@
 #[link(name = "get_task_id")];
 
 extern mod rustrt {
-      fn get_task_id() -> int;
+      fn get_task_id() -> libc::intptr_t;
 }
 
 fn main() { }

src/test/run-pass/item-attributes.rs

@@ -163,7 +163,7 @@ mod test_foreign_items {
         #[attr];
 
         #[attr]
-        fn get_task_id() -> int;
+        fn get_task_id() -> libc::intptr_t;
     }
 }
 

src/test/run-pass/morestack6.rs

@@ -8,7 +8,7 @@
 extern mod rustrt {
     fn debug_get_stk_seg() -> *u8;
 
-    fn rust_get_sched_id() -> int;
+    fn rust_get_sched_id() -> libc::intptr_t;
     fn last_os_error() -> ~str;
     fn rust_getcwd() -> ~str;
     fn get_task_id();