Update from https://crrev.com/329939

Includes an update to build_v8.patch. https://crrev.com/329939 includes
mac->android cross compilation fixes.

TBR=cstout@chromium.org

Review URL: https://codereview.chromium.org/1141793003
diff --git a/build/get_landmines.py b/build/get_landmines.py
index 8f5b878..71345bb 100755
--- a/build/get_landmines.py
+++ b/build/get_landmines.py
@@ -69,6 +69,8 @@
   print 'Another clobber for missing NaCl gyp deps (crbug.com/427427).'
   print 'Clobber to fix GN not picking up increased ID range (crbug.com/444902)'
   print 'Remove NaCl toolchains from the output dir (crbug.com/456902)'
+  if platform() == 'ios':
+    print 'Clobber iOS to workaround Xcode deps bug (crbug.com/485435)'
 
 
 def main():