capture_gles_1_0: Implement capture functions. Implement various capture functions as required by the GLES1 tests and GLES1 applications like Dr. Driving. Implements glMultMatrixf, glTexEnvxv, glLightxv, glLoadMatrixf and glGetFixedv. Bug: angleproject:5751 Change-Id: Id22899d755a9126f91b37eeea4619d6a03636f8a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2756533 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Cody Northrop <cnorthrop@google.com> Commit-Queue: Jamie Madill <jmadill@chromium.org>