Import gdbstub_arch-0.1.0 am: 52a992f950 am: e54eca01fa am: bd0fc1143e am: a481b6e84e am: 2966eb1057 am: 4433ae88d6

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/gdbstub_arch/+/1783794

Change-Id: I077435bc1ba20fb2a66886dd706072dcd4ac3c68