Front-end Arrays of arrays: Add ES-specific checks and tests.  AoA should be quite close to done now.
diff --git a/Test/430.comp b/Test/430.comp
index 663fdde..0929432 100644
--- a/Test/430.comp
+++ b/Test/430.comp
@@ -20,7 +20,7 @@
 

 buffer InvalidShaderStorageBlock

 {

-    float values[];  // ERROR

+    float values[];

     int value;

 } invalid;