Print the command line, not ['Print', 'the', 'command', 'line'].

BUG=skia:
R=borenet@google.com, mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/521473004

py/utils/shell_utils.py

diff --git a/py/utils/shell_utils.py b/py/utils/shell_utils.py
index 37d124b..4068b81 100644
--- a/py/utils/shell_utils.py
+++ b/py/utils/shell_utils.py
@@ -53,7 +53,7 @@
   if echo is None:
     echo = VERBOSE
   if echo:
-    print cmd
+    print ' '.join(cmd) if isinstance(cmd, list) else cmd
   if 'nt' in os.name:
     # Windows has a bad habit of opening a dialog when a console program
     # crashes, rather than just letting it crash.  Therefore, when a program