results: Parse run number of new Antutu runs correctly

Antutu runs are numbered from 1 ("Overall_Score",
"Overall_Score_2,...) whereas all the other benchmarks are numbered
from 0 ("FPS_0", "FPS_1",...).  Work around it so that Antutu scores
are reported consistently with the rest
diff --git a/tests/test_results.py b/tests/test_results.py
index 6600969..d56cd39 100644
--- a/tests/test_results.py
+++ b/tests/test_results.py
@@ -90,6 +90,8 @@
         self.assertEquals(results.get_run_number("score"), (True, 0))
         self.assertEquals(results.get_run_number("score 3"), (True, 3))
         self.assertEquals(results.get_run_number("FPS_1"), (True, 1))
+        self.assertEquals(results.get_run_number("Overall_Score"), (True, 0))
+        self.assertEquals(results.get_run_number("Overall_Score_2"), (True, 1))
         self.assertEquals(results.get_run_number("Memory_score")[0], False)
 
     def test_plot_results(self):