examples/gl_basic: Don't set display name
examples/gl_basic: Don't set display name

When calling waffle_display_connect(display_name), gl_basic set
display_name such that it reproduced the same behavior if display_name
were set to NULL. That is, gl_basic wasted code setting display_name to
non-NULL, when the same effect is accomplished by leaving it NULL.

Kill the stupid code. Leave display_name=NULL.

Signed-off-by: Chad Versace <a557f7f75bf28dc19ac99107f5cc7cd6b3fbdb1a@linux.intel.com>

maurossi/waffle,dcbaker/waffle,chadversary/waffle,waffle-gl/waffle,janesma/waffle,maurossi/waffle,evelikov/waffle,maurossi/waffle,yinquan529/waffle-gl-waffle,dcbaker/waffle,fjhenigman/waffle,dcbaker/waffle,waffle-gl/waffle,fjhenigman/waffle,yinquan529/waffle-gl-waffle,waffle-gl/waffle,yinquan529/waffle-gl-waffle,janesma/waffle,evelikov/waffle,evelikov/waffle,chadversary/waffle,waffle-gl/waffle,fjhenigman/waffle,janesma/waffle,chadversary/waffle