examples: add waffle_has_x11_egl check for simple-x11-egl
examples: add waffle_has_x11_egl check for simple-x11-egl

v2: remove redudant parenthesis (Chad)

Signed-off-by: Tapani Pälli <cdcb67a5e49297de94340ca09f25994bd5e7f762@intel.com>
Reviewed-by: Chad Versace <a557f7f75bf28dc19ac99107f5cc7cd6b3fbdb1a@intel.com>

fjhenigman/waffle,chadversary/waffle,chadversary/waffle,maurossi/waffle,evelikov/waffle,waffle-gl/waffle,waffle-gl/waffle,dcbaker/waffle,waffle-gl/waffle,dcbaker/waffle,maurossi/waffle,chadversary/waffle,evelikov/waffle,maurossi/waffle,evelikov/waffle,waffle-gl/waffle,fjhenigman/waffle,dcbaker/waffle,fjhenigman/waffle