vndk-def: Add libvndksupport to LL-NDK

This commit adds libvndksupport.so to LL-NDK list.  libvndksupport.so
is a wrapper library over some platform-only libdl.so APIs.

Bug: 37867089
Test: ./tests/test_ndk_libs.py
Change-Id: I74e66065b5e6a7f75ff24e9ba651c52b3f47162d
Merged-In: I25465f6d94441a22da3bf9a7c8417e2388c764da
2 files changed