set label type to int64 to pass windows test

test=develop

python/paddle/fluid/tests/unittests/test_sample_logits.py

@@ -263,7 +263,7 @@ class TestSampleLogitsOpV2(OpTest):
             'remove_accidental_hits': remove_accidental_hits,
             'seed': seed
         }
-        self.inputs = {'Logits': logits, 'Label': label}
+        self.inputs = {'Logits': logits, 'Label': label.astype(np.int64)}
 
     def set_data(self, num_classes, num_samples, seed, remove_accidental_hits):
         label = np.array([[6, 12, 15, 5, 1], [0, 9, 4, 1, 10],
@@ -347,7 +347,7 @@ class TestSampleLogitsOpV3(OpTest):
             'remove_accidental_hits': remove_accidental_hits,
             'seed': seed
         }
-        self.inputs = {'Logits': logits, 'Label': label}
+        self.inputs = {'Logits': logits, 'Label': label.astype(np.int64)}
 
     def set_data(self, num_classes, num_samples, seed, remove_accidental_hits):
         label = [52, 2, 2, 17, 96, 2, 17, 96, 37, 2]