CheckCallDie: add option to suppress successful output

build/android/gyp/dex.py

Index: build/android/gyp/dex.py
diff --git a/build/android/gyp/dex.py b/build/android/gyp/dex.py
index 69d3d96ac29d0b00e58c905cf276104edf9cab4d..99834c4fe0908ae83fb094ba0206ea16c57dbc53 100755
--- a/build/android/gyp/dex.py
+++ b/build/android/gyp/dex.py
@@ -9,13 +9,9 @@ import optparse
 import os
 import sys
 
+from util import build_utils
 from util import md5_check
 
-BUILD_ANDROID_DIR = os.path.join(os.path.dirname(__file__), '..')
-sys.path.append(BUILD_ANDROID_DIR)
-
-from pylib import build_utils
-
 
 def DoDex(options, paths):
   dx_binary = os.path.join(options.android_sdk_root, 'platform-tools', 'dx')
@@ -25,7 +21,7 @@ def DoDex(options, paths):
   md5_checker = md5_check.Md5Checker(
       stamp=md5_stamp, inputs=paths, command=dex_cmd)
   if md5_checker.IsStale():
-    build_utils.CheckCallDie(dex_cmd)
+    build_utils.CheckCallDie(dex_cmd, suppress_output=True)
   else:
     build_utils.Touch(options.dex_path)
   md5_checker.Write()