doxygen: Optimize output for C
doxygen: Optimize output for C

OPTIMIZE_OUTPUT_FOR_C = YES

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

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