tests: ignore 'com.apple.provenance' xattr (macOS specific)

src/borg/testsuite/xattr.py

@@ -23,7 +23,7 @@ class XattrTestCase(BaseTestCase):
 
     def assert_equal_se(self, is_x, want_x):
         # check 2 xattr lists for equality, but ignore security.selinux attr
-        is_x = set(is_x) - {b'security.selinux'}
+        is_x = set(is_x) - {b'security.selinux', b'com.apple.provenance'}
         want_x = set(want_x)
         self.assert_equal(is_x, want_x)