adbd: properly close subprocess pipes on Ctrl+C.
am: a6d5661140

* commit 'a6d56611404f2e1c0c9f4ab7c8471af0e80b2026':
  adbd: properly close subprocess pipes on Ctrl+C.

Change-Id: I96c1fb2036a58702b23f606bb1e6a27f924324eb