Add compilation mode flags for forward-compatible contexts and relaxed error checking.  These initiate as arguments to ShCompile() and both default to being off.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@20817 e7fa87d3-cd2b-0410-9028-fcbf551c1848