Expect failure for test cleanup

Author: danyeaw

testbed/tests/widgets/test_passwordinput.py

@@ -45,7 +45,9 @@ def verify_font_sizes():
     return False, True
 
 
-test_cleanup = build_cleanup_test(toga.PasswordInput, xfail_platforms=("android",))
+test_cleanup = build_cleanup_test(
+    toga.PasswordInput, xfail_platforms=("android", "linux")
+)
 
 
 async def test_value_hidden(widget, probe):

testbed/tests/widgets/test_textinput.py

@@ -52,7 +52,7 @@ async def placeholder(request, widget):
     widget.placeholder = request.param
 
 
-test_cleanup = build_cleanup_test(toga.TextInput, xfail_platforms=("android",))
+test_cleanup = build_cleanup_test(toga.TextInput, xfail_platforms=("android", "linux"))
 
 
 async def test_value_not_hidden(widget, probe):