Preprocessor: Add short-circuit logic so ES errors are not given on undefined variables that are short circuited in && and || preprocessing expressions.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24390 e7fa87d3-cd2b-0410-9028-fcbf551c1848