Failing test are: cctest/cctest/test-run-wasm/RunWasmLiftoff*.
Test started to fail after this commit: 56b8ab5d
This patch also fixes MIPS big endian build failure.

Change-Id: I333450f2a8f9c9a61db9aea18e5e973f48742d52
Reviewed-on: https://chromium-review.googlesource.com/c/1286348Reviewed-by: Ivica Bogosavljevic <ibogosavljevic@wavecomp.com>
Commit-Queue: Ivica Bogosavljevic <ibogosavljevic@wavecomp.com>
Cr-Commit-Position: refs/heads/master@{#56742}