Fix perf_test_runner printing wrong test name

The previous version of the script would always print the default test
name even if user specified a different one.

BUG=angleproject:596

Change-Id: I43a07e81b49f69c7c372b46bd9494d6fe440b968
Reviewed-on: https://chromium-review.googlesource.com/319091
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
diff --git a/scripts/perf_test_runner.py b/scripts/perf_test_runner.py
index db8e93b..5934a0e 100644
--- a/scripts/perf_test_runner.py
+++ b/scripts/perf_test_runner.py
@@ -76,12 +76,12 @@
 
 test_name = "DrawCallPerfBenchmark.Run/d3d11_null"
 
-print('Using test executable: ' + perftests_path)
-print('Test name: ' + test_name)
-
 if len(sys.argv) >= 2:
     test_name = sys.argv[1]
 
+print('Using test executable: ' + perftests_path)
+print('Test name: ' + test_name)
+
 # Infinite loop of running the tests.
 while True:
     output = subprocess.check_output([perftests_path, '--gtest_filter=' + test_name])