Add rlib support for vendor_snapshot/update.py

Adds support for collecting rlibs as part of the vendor snapshot.

Bug: 184042776
Test: m dist vendor-snapshot
Test: python3 development/vendor_snapshot/update.py --local $DIST_DIR --install-dir
    vendor/vendor_name/vendor_snapshot VER
Test: vendor_snapshot_rlib modules generated, vendor_snapshot has rlibs
Change-Id: Ia90e53131c4ffba32883718b66ba99f4962d4633
1 file changed