Fixes to scanning:

- do version checking for the line-continuation character
 - check for built-in names in #undef
 - bug fix for #elif after #else
 - do version checking for use of floating point suffixes (f, LF, etc.)


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24011 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/sample.frag

@@ -37,5 +37,5 @@ varying vec3 color;
 
 void main()
 {
-    gl_FragColor = vec4(color, 1.0f);
+    gl_FragColor = vec4(color, 1.0);
 }