Upgrade zlib to fa5dc4750029333c2486efa38eec7d13890108ed

This project was upgraded with external_updater.
Usage: tools/external_updater/updater.sh update zlib
For more info, check https://cs.android.com/android/platform/superproject/+/master:tools/external_updater/README.md

Test: TreeHugger
Change-Id: I1a71633c26d16515992d7fca3c87dde46457b2f3