Put angle::Format table in a cpp file. The best practice is to expose a non-constexpr query function and hide the constexpr table in a cpp, so it won't be included verbatim in multiple other source files. BUG=angleproject:1389 Change-Id: Ic4e19d14c832643be1552c5a14e441826c41970f Reviewed-on: https://chromium-review.googlesource.com/404478 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>