Update the format of module variant dir name

The old suffixes were _core_shared and _vendor.{VER}_shared.
The new suffix is _shared. The new prefix for VNDK is vendor.{VER}_.

Bug: 147254738
Test: ./create_reference_dumps.py
Change-Id: Ieb37c14d5deaab437783c07edf268c1488afa441
1 file changed