Updates bench alert test output to match latest changes.

tools/tests/benchalerts/Perf-Android-Nexus7-Tegra3-Arm7-Release/output-expected/stderr

Index: tools/tests/benchalerts/Perf-Android-Nexus7-Tegra3-Arm7-Release/output-expected/stderr
diff --git a/tools/tests/benchalerts/Perf-Android-Nexus7-Tegra3-Arm7-Release/output-expected/stderr b/tools/tests/benchalerts/Perf-Android-Nexus7-Tegra3-Arm7-Release/output-expected/stderr
index 7bb933d4512e07ad36e167f1e833846354f8c1b9..fb73681d951089d1ee45bb30187109edc68afb75 100644
--- a/tools/tests/benchalerts/Perf-Android-Nexus7-Tegra3-Arm7-Release/output-expected/stderr
+++ b/tools/tests/benchalerts/Perf-Android-Nexus7-Tegra3-Arm7-Release/output-expected/stderr
@@ -1,14 +1,14 @@
 Traceback (most recent call last):
-  File "bench/check_bench_regressions.py", line 259, in <module>
+  File "bench/check_bench_regressions.py", line 263, in <module>
     main()
-  File "bench/check_bench_regressions.py", line 255, in main
+  File "bench/check_bench_regressions.py", line 259, in main
     check_expectations(bench_dict, bench_expectations, platform_and_alg)
-  File "bench/check_bench_regressions.py", line 203, in check_expectations
+  File "bench/check_bench_regressions.py", line 207, in check_expectations
     raise Exception('\n'.join(outputs))
 Exception: 
-2 Slower benche(s) (Sorted):
+2 benches got slower (sorted by % difference):
 Bench desk_blogger.skp_record_,Perf-Android-Nexus7-Tegra3-Arm7-Release-25th out of range [0.4, 0.6] (1.794 vs 0.5, 258.8%).
 Bench desk_amazon.skp_record_,Perf-Android-Nexus7-Tegra3-Arm7-Release-25th out of range [-1.0, 1.2] (1.213 vs 1.1, 10.2727272727%).
 
-1 Faster benche(s) (Sorted):
+1 benches got faster (sorted by % difference):
 Bench desk_baidu.skp_record_,Perf-Android-Nexus7-Tegra3-Arm7-Release-25th out of range [0.9, 1.0] (0.83 vs 0.939, -11.6080937167%).