Pin to https://github.com/bazelbuild/rules_apple/commit/0a2c39c0209087e39818c16908c545d744a2e0ca (#588)
Pin to https://github.com/bazelbuild/rules_apple/commit/0a2c39c0209087e39818c16908c545d744a2e0ca (#588)

This allows us to run tests on ARM.
russellhancox/santa,tburgin/santa,russellhancox/santa,tburgin/santa,russellhancox/santa,google/santa,tburgin/santa,google/santa,google/santa