Enable the various chrome zlib optimizations.

This is for arm/arm64 only, because there are test failures for
x86/x86-64 that we haven't understood yet.

Bug: https://issuetracker.google.com/115695768
Bug: https://issuetracker.google.com/135889247
Bug: http://b/135038583
Test: boots
Test: zlib_bench scores 2x or more faster on arm/arm64
Change-Id: I1f991cb71338bc99885edbebc964f2ad3b14234a