vndk-def: Add libvulkan.so to SP-NDK.

As discussed in F2F meeting, add libvulkan.so to SP-NDK to allow vendor
usages.

Test: ./tests/run.py
Change-Id: Ifebf01f24339a75309df24411eb7ee6a37661f9e
(cherry picked from commit 5fa0613c5fb3252c852122bcb86cb167385f444a)
2 files changed