Mobile support

[richard-ramos]

Currently go-zerokit-rln can only be used in desktop devices. Support for mobile devices must be added:
According to the NDK docs

ABI	Triple
armeabi-v7a	armv7-linux-androideabi
arm64-v8a	aarch64-linux-android
x86	i686-linux-android
x86-64	x86_64-linux-android

Do notice that there's a note that says:

Note: For 32-bit ARM, the compiler is prefixed with armv7a-linux-androideabi, but the binutils tools are prefixed with arm-linux-androideabi. For other architectures, the prefixes are the same for all tools.

So maybe it's necessary to support arm-linux-androideabi which might be problematic due to the following error:

error[E0432]: unresolved imports `std::sync::atomic::AtomicI64`, `std::sync::atomic::AtomicU64`
 --> /cargo/registry/src/github.com-1ecc6299db9ec823/loupe-0.1.3/src/memory_usage/sync.rs:7:43
  |
7 |         AtomicBool, AtomicI16, AtomicI32, AtomicI64, AtomicI8, AtomicIsize, AtomicU16, AtomicU32,
  |                                           ^^^^^^^^^ no `AtomicI64` in `sync::atomic`
8 |         AtomicU64, AtomicU8, AtomicUsize,
  |         ^^^^^^^^^ no `AtomicU64` in `sync::atomic`

Although I expect that armv7-linux-androideabi is the one to be used and should work fine. Zerokit compiles fine for all the target triples from the first table. For ios, I was able to cross compile zerokit to aarch64-apple-ios and x86_64-apple-ios succesfully.

For implementing this task, we need to modify go-zerokit-rln-x86_64, go-zerokit-rln-arm and go-zerokit-rln-apple to add build constraints that take into account when android is being used.