Use libbitflags-1.3.2 am: 0c792fd2b0 am: e578b677f5 am: 052bf6d8d8 am: 77cec5d316

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/nix/+/2565137

Change-Id: I8fad37eae679919e9b1a8b981a2a41e531efc9c2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>