update obsolete code.google.com documentation links

tools/clang/scripts/update.py

Index: tools/clang/scripts/update.py
diff --git a/tools/clang/scripts/update.py b/tools/clang/scripts/update.py
index ef6ca07af8c226cfda52d27b601b1551a4b4a5f4..489961e484c3964513b7fbf4a448fc2cfb17f68f 100755
--- a/tools/clang/scripts/update.py
+++ b/tools/clang/scripts/update.py
@@ -24,7 +24,7 @@ import urllib2
 import zipfile
 
 # Do NOT CHANGE this if you don't know what you're doing -- see
-# https://code.google.com/p/chromium/wiki/UpdatingClang
+# https://chromium.googlesource.com/chromium/src/+/master/docs/updating_clang.md
 # Reverting problematic clang rolls is safe, though.
 CLANG_REVISION = '255169'
 
@@ -378,7 +378,7 @@ def UpdateClang(args):
     print 'Android NDK not found at ' + ANDROID_NDK_DIR
     print 'The Android NDK is needed to build a Clang whose -fsanitize=address'
     print 'works on Android. See '
-    print 'http://code.google.com/p/chromium/wiki/AndroidBuildInstructions'
+    print 'https://www.chromium.org/developers/how-tos/android-build-instructions'
     print 'for how to install the NDK, or pass --without-android.'
     return 1