Eliminate flex as the GLSL lexical analyzer, going from two nested lexical analyzers down to one, leaving just the preprocessor's lexical analysis. A new layer replaces it, to translate from the preprocessor's view of tokenization to glslang's view of tokenization.

Also:
 - change source locations from an int to TSourceLoc (shader number, line number) throughout
 - various improvements to the preprocessor


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@22277 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/lineContinuation.vert

@@ -1,14 +1,20 @@
 #version 300 es
 
 // this file cont\
-ains no errors
+ains no errors other than the #error which are there to see if line numbering for errors is correct
+
+#error e1
 
 float f\
 oo;  // same as 'float foo;'
 
+#error e2
+
 #define MAIN void main() \
 {                        \
 gl_Position = vec4(foo); \
 } 
 
+#error e3
+
 MAIN