GetOperatorString is now used when writing GLSL for built-in calls
that fall under TIntermAggregate. Component wise and not component
wise TOperator enums are disambiguated from each other.
BUG=angleproject:1682
TEST=angle_unittests, angle_end2end_tests, WebGL conformance tests
Change-Id: I861f1e94eb695eb712592df99705848b442ef07b
Reviewed-on: https://chromium-review.googlesource.com/424532Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
