On Android, LOCALSTATEDIR should be set to static path

On Android, there is no such thing as installing into the absolute system paths. So we have to hack around that assumption in ./configure. That means that LOCALSTATEDIR ends up getting set to build paths, breaking reproducibility. Since having a compiled-in LOCALSTATEDIR is worthless on Android, it should not be used for Android build. It could just be hard-coded to some debug path like /data/local/tmp.

This is similar to !460 (closed)

@n8fr8 FYI