Squashed 'deps/v8/' content from commit c9fdc5a

git-subtree-dir: deps/v8
git-subtree-split: c9fdc5a3b2e79cc58a28c2691b7274aef80e9c73
Merge commit '24dfe1c6864c6d802b3ed57b268a52d68e92046e' as 'deps/v8'
Remove unneccesray .gitkeep from deps.