Add script to do a drop of the ART module prebuilts.

Originates from prebuilts/runtime/common/python/update_prebuilts.py but
minimised and adapted.

Test: art/build/update-art-module-prebuilts.py --build 6997927 --upload
Test: art/build/update-art-module-prebuilts.py --local-dist out/dist/
Test: gpylint art/build/update-art-module-prebuilts.py
Bug: 172480615
Change-Id: I0322999f136f57f9582afba6bc6ba4ccb76643db
1 file changed