Skip flaky tests

Lib/test/test_subprocess.py

@@ -2516,8 +2516,7 @@ class POSIXProcessTestCase(BaseTestCase):
         p1.stdout.close()
         p2.stdout.close()
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
+    @unittest.skip("TODO: RUSTPYTHON, flaky test")
     def test_close_fds(self):
         fd_status = support.findfile("fd_status.py", subdir="subprocessdata")
 
@@ -2645,8 +2644,7 @@ class POSIXProcessTestCase(BaseTestCase):
                          msg="Some fds were left open.")
 
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
+    @unittest.skip("TODO: RUSTPYTHON, flaky test")
     # Mac OS X Tiger (10.4) has a kernel bug: sometimes, the file
     # descriptor of a pipe closed in the parent process is valid in the
     # child process according to fstat(), but the mode of the file