app-eselect/eselect-opengl: Upgrade to upstream.

This eliminates the use of path_exists since the EAPI 7 eclasses banned
its use.

BUG=chromium:1117585
TEST=CQ passes

Change-Id: I1cd2f56fb7e11a0a7cd26640eecd3bad5c6484ee
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2372693
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Allen Webb <allenwebb@google.com>
Tested-by: Allen Webb <allenwebb@google.com>
1 file changed