Test that ESSL 300 standard derivatives compile successfully These functions have the same name in the ESSL 100 extension, creating a possibility for conflicts. This adds a convenient way to test for regressions when refactoring the symbol table. BUG=angleproject:2267 TEST=angle_unittests Change-Id: I9716524a0ea85064ba5f3ee8e7adfbdfc59d257e Reviewed-on: https://chromium-review.googlesource.com/945989 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>