Update the android cmake toolchain file to support 64bit.

This is available in a PR here: https://github.com/taka-no-me/android-cmake/pull/23
The maintainer of the android toolchain cmake file seems to be AWOL for now.
I have tested this file personally and it works, it just isn't merged in yet
Merge pull request #901 from Sonicadvance1/64bit-android-cmake

Update the android cmake toolchain file to support 64bit.