A little more print debugging

TBR=epoger
BUG=skia:1329

Review URL: https://codereview.chromium.org/196793015

scripts/run_cmd.py

diff --git a/scripts/run_cmd.py b/scripts/run_cmd.py
index edc00e6..7bfc3a7 100755
--- a/scripts/run_cmd.py
+++ b/scripts/run_cmd.py
@@ -172,6 +172,7 @@
   Returns:
       subprocess.Popen instance.
   """
+  print ' '.join(cmd)
   return subprocess.Popen(cmd, shell=False, stderr=subprocess.PIPE,
                           stdout=subprocess.PIPE)