add llndk|vndksp.libraries.txt to vndk_package

Bug: 64882323
Test: build 2017 pixel devices. check the files are under /system/etc.

Merged-In: I488427f796b770bb2d151cfa49f73d323cafbc9f
Change-Id: I488427f796b770bb2d151cfa49f73d323cafbc9f
(cherry picked from commit 686aff5b)