Upgrade zlib to d866d41e168ec04545bb17031fa911007a0581f4

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: I5a24563bf9accd8d57630e7236011df4acc367ac