Add --llndk to create_reference_dumps.py for llndk libraries.

Currently, we do abi checks on the system variants of llndk libraries.
Therefore, add an 'llndk' flag to specify that the system variant should be
built.

Bug: 77101345

Test: utils/create_reference_dumps.py --llndk -l libdl produces
      libdl references.

Merged-In: Id4c607674f096daf041520d4a1ca43199d4451da
Change-Id: Id4c607674f096daf041520d4a1ca43199d4451da
(cherry picked from commit cd0e8aff22e8d2fed692291b8d22d16456ddf9e8)
3 files changed