android toolchain and CMakeLists.txt update

cmake: android toolchain update to latest upstream and set ANDROID_DEFAULT_NDK_API_LEVEL 9
android CMakeLists.txt: added support for both 'support' and 'compatibility' in support library path for v7 appcompat
supports path styles:
$ANDROID_SDK/extras/android/support/v7/appcompat
$ANDROID_SDK/extras/android/compatibility/v7/appcompat
Maybe something like Please install Support Library?

I'll add something.