Fix the problem of incremental OTA upgrade failure (zlib part)

The OTA tools imgdiff (host, so typically x86-64) and
updater (device, so typically arm64) compress the same file, both
using our zlib.

This produces different results if we allow this x86-64-only
optimization, and causes test failures after the next upstream
chromium zlib update.

Test: make imgdiff updater
Change-Id: Iebab590c74d2c19dde08277587ea9c72a4acbb1c
Signed-off-by: luoqiangwei1 <luoqiangwei1@xiaomi.com>