Added constant folding for relational (e.g. lessThan) built-ins, relational built-ins for uints, and bitwise ops for mixed scalars and vectors.

Also, allow comments to precede "#version 100".

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@23974 e7fa87d3-cd2b-0410-9028-fcbf551c1848
diff --git a/Test/100.frag b/Test/100.frag
index 61107c2..4250ab7 100644
--- a/Test/100.frag
+++ b/Test/100.frag
@@ -1,5 +1,5 @@
+// okay

 #version 100

-

 int a[3] = { 2, 3, 4, };  // ERROR

 

 int uint;