* Android build scripts: Changed default SDK level to 21; enabled specifying NDK_PLATFORM environment variable for custom SDK level; misc cleanup of Android build scripts
* Update android-aar.sh
I forgot to hit save on the script after making this change locally. The script works either way but by setting this value again in android-build.sh people can more easily build arch specific binaries if they want so the export is unnecessary but also rather meaningless.
ReenigneCA