On Windows, absl's time_internal library does some stuff to achieve having a weak symbol. This completely fails in our binary builds.
On Windows, absl's time_internal library does some stuff to achieve
having a weak symbol. This completely fails in our binary builds.

Our binary builds don't care about zone_info_source_factory being a weak
symbol. This change makes absl time_info no longer broken on Windows.

firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk