Use versioned VNDK directories in ld.config.txt

All vndk/vndk-sp directories will have version suffix if
"ro.vndk.version" is set.

Bug: 69984421
Bug: 66074376
Test: Build with BOARD_VNDK_VERSION=current and
      BOARD_VNDK_RUNTIME_DISABLE=true. Check boot.

Change-Id: I03849f9f96bc6c7880aa70c517e963aab4e033b8