Upgrade rust/crates/structopt-derive to 0.4.14 am: 70c1ca6945 am: f15a656dc5

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/structopt-derive/+/1514956

Change-Id: Ia7429fd7c84d27fb6872987c32b3e90d97c80647