How to build sr25519 for using in android?

I tried to build that with ndk toolchains an when i tried to use that got this exception

```java
java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "_Unwind_Backtrace" referenced by "/data/app/jp.co.soramitsu.sora.develop-QgQ2h40xY4_vNE-yhvKgpg==/lib/arm64/libjni.so"...
```