Created by: LegNeato
With the latest version of the NDK, arm is not supported.
Fixes https://github.com/facebook/buck/issues/1890.
This could possibly be a breaking change for people who have not set CPU ABI and are not using the latest NDK---before their builds would have arm, after updating Buck they will no longer and might wonder what happened. Open to strategies to dealing with that, though they can always just add arm to cpu_abis in their config to fix any bustage. While buck could detect this case, it seems like a bit too much magic to be worth it.
Note that this is somewhat related to https://github.com/facebook/buck/pull/1889 but not exactly.