Allow passing multiple crates to update_crate_tests.py

Currently the script can only run on a single crate at a time, and
each time it runs it re-initializes Bazel. By passing multiple crates
we can save time by only initializing Bazel once.

Test: Call with zero, one, and multiple crate arguments.
Change-Id: Ic83c16d87066a8555b736b35bc7971586ee26e16
1 file changed