MIPS: skip embenchen/zlib test.
MIPS: skip embenchen/zlib test.

zlib is broken for mips after 35eb3a0260d349cb4201fed66ff62a438962bd47.

We're still working on a fix. Skip test for now, so the bots cycle green.

BUG=

Review URL: https://codereview.chromium.org/1209253005

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#29356}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh