Updated for NDK r9b

```
Change in ANDROID_SUPPORTED_NDK_VERSIONS (added -r9b) and the new directory 
change for Linux-x86_64 (ANDROID_NDK_HOST_SYSTEM_NAME)
```

Original issue reported on code.google.com by `cyr...@gmail.com` on 8 Dec 2013 at 4:46

Attachments:
- [android.toolchain.cmake.patch](https://storage.googleapis.com/google-code-attachments/android-cmake/issue-19/comment-0/android.toolchain.cmake.patch)
