man: Update urls to source repo and example code
man: Update urls to source repo and example code

Waffle's git repo has moved from Freedesktop to Github.

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

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