readme: Fix example code, again
readme: Fix example code, again

Fix typo: creat -> create.
Remove call to waffle_finish().

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

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