1) Allow '\' before a non-newline as a token in the preprocessor, and 2) localize line-continuation to just the pp scanner.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24530 e7fa87d3-cd2b-0410-9028-fcbf551c1848