[test] Make scale-test compatible with Python 3

Author: drodriguez

utils/scale-test

@@ -69,7 +69,7 @@ def write_input_file(args, ast, d, n):
 
 def ensure_tmpdir(d):
     if d is not None and not os.path.exists(d):
-        os.makedirs(d, 0700)
+        os.makedirs(d, 0o700)
     return tempfile.mkdtemp(dir=d)
 
 
@@ -81,7 +81,7 @@ def supports_stats_output_dir(args):
     sd = os.path.join(d, "stats-probe")
 
     try:
-        os.makedirs(sd, 0700)
+        os.makedirs(sd, 0o700)
         # Write a trivial test program and try running with
         # -stats-output-dir
         testpath = os.path.join(sd, "test.swift")