Update from https://crrev.com/327068

build/android/gyp/util/build_utils.py

Index: build/android/gyp/util/build_utils.py
diff --git a/build/android/gyp/util/build_utils.py b/build/android/gyp/util/build_utils.py
index a0cd7c12eee06df60e4539b775af639275f9e830..65b1a643c26a2ca920ff176af40bfcad85057f3d 100644
--- a/build/android/gyp/util/build_utils.py
+++ b/build/android/gyp/util/build_utils.py
@@ -24,7 +24,7 @@ COLORAMA_ROOT = os.path.join(CHROMIUM_SRC,
                              'third_party', 'colorama', 'src')
 # aapt should ignore OWNERS files in addition the default ignore pattern.
 AAPT_IGNORE_PATTERN = ('!OWNERS:!.svn:!.git:!.ds_store:!*.scc:.*:<dir>_*:' +
-                       '!CVS:!thumbs.db:!picasa.ini:!*~')
+                       '!CVS:!thumbs.db:!picasa.ini:!*~:!*.d.stamp')
 
 
 @contextlib.contextmanager
@@ -236,6 +236,7 @@ def ZipDir(output, base_dir):
 
 
 def MergeZips(output, inputs, exclude_patterns=None):
+  added_names = set()
   def Allow(name):
     if exclude_patterns is not None:
       for p in exclude_patterns:
@@ -247,8 +248,9 @@ def MergeZips(output, inputs, exclude_patterns=None):
     for in_file in inputs:
       with zipfile.ZipFile(in_file, 'r') as in_zip:
         for name in in_zip.namelist():
-          if Allow(name):
+          if name not in added_names and Allow(name):
             out_zip.writestr(name, in_zip.read(name))
+            added_names.add(name)
 
 
 def PrintWarning(message):