Enumerate multisampled EGL configs. Bug 23535380 Change-Id: I4bc3d9821812253df46262f59d9a55a5802f00b0 Reviewed-on: https://swiftshader-review.googlesource.com/3936 Reviewed-by: Greg Hartman <ghartman@google.com> Reviewed-by: Nicolas Capens <capn@google.com> Tested-by: Nicolas Capens <capn@google.com>