There are some circular include dependencies in the zlib
build system because some parts are extracted into their
own targets. To make gn check understand that, those targets
need to be added to the allow_circular_includes_from list.

Bug: 898837
Change-Id: Ic94c5f5ac88e10792b458f4d734c4ad0487023c2
Reviewed-on: https://chromium-review.googlesource.com/c/1299135


Reviewed-by: Chris Blume <cblume@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Original-Commit-Position: refs/heads/master@{#604210}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: f2f7bfe61121c05d9a510b949931e395dce40608