Add missing functions to libEGL.def The functions weren't properly exposed from the EGL_ANGLE_feature_control extension. Bug: angleproject:1621 Change-Id: Ie91a18966a84db88d6a9a555e75cba8cea0a6521 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1688498 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>