More subtle checking for redeclarations:

- 300 doesn't allow built-in overload, while 100 does, while neither allows redefining
 - block name can't be reused for block name within the same interface 
   (though, the spec. isn't clear about that, it's easier than verifying member matches, will file bug on it)


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@23984 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/300.vert

@@ -80,3 +80,27 @@ out S s2;
 invariant s2;
 invariant out S s3;
 flat out int;
+
+uniform ub2 {
+    float f;
+} a;
+
+uniform ub2 {  // ERROR redeclaration of block name (same instance name)
+    float g;
+} a;
+
+uniform ub2 {  // ERROR redeclaration of block name (different instance name)
+    float f;
+} c;
+
+uniform ub2 {  // ERROR redeclaration of block name (no instance name)
+    float f123;
+};
+
+uniform ub3 {
+    bool b23;
+};
+
+uniform ub3 {  // ERROR redeclaration of block name (no instance name in first or declared)
+    bool b234;
+};