js: Add fileacces interface that lets plugin expose raw filesystem API

Currently in a early stage, only open() and stat() is supported.
Also open() does only support redirecting to another URL
android.configure: Bootstrap toolchain from configure script
lastfm: Drop debug flag
media: Avoid creating per-URL settings for non-video playback
js: Add scandir() to fileaccess bindings
android: Various arch specific stuff

Some JNI bindings, audio support, etc