manifest: Sync x86_64 webview prebuilts again

Also, no need to shallow-clone the other arch prebuilts either.

git-lfs magic ^^

Change-Id: Ica014d199265b7c037087d25937271e5a6553a82
2 files changed
tree: 331080ded0a2f2abdc8c696ee4477bfa58184350
  1. snippets/
  2. default.xml
  3. README.mkdn