Add skeleton for generating documentation of a side project.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@27950 e7fa87d3-cd2b-0410-9028-fcbf551c1848
Add option for printing documentation (empty).


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@27966 e7fa87d3-cd2b-0410-9028-fcbf551c1848