Unfortunately GLES is not a common package for a linux desktop
to have installed. To avoid bind-based users having to jump
through the hoop of installing GL, disable this performance
optimization on linux for now.
Change-Id: Ic00baef6237dca360f191ec291b6c165eda7ad6e
Reviewed-on: https://go-review.googlesource.com/13874
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>