work around compiler bug for mips64el/-O3

Change-Id: Ia724455b8531f93623e97197cd7778a3297e38ba
Reviewed-on: https://skia-review.googlesource.com/c/162005
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
3 files changed