work around GCC 8 mips release bug?

This feels kind of bad, but at least it's just a unit test?

Change-Id: I18740f846680218a00add40eb2398876c4fd19be
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/258023
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed