Add support for a generate scope to vvp and the vpi routines.

Instead of just translating a generate scope to a named begin/end scope
this patch creates a generate specific scope (vpiScopeGenerate) that is
of the vpiGenScope type. This may not match the standard 100%, but does
allow the FST dumper to denote generate scopes differently than the
other scope types. Most of the VPI code treats a vpiGenScope just like a
named block so only the FST dumper should have different behavior.

libveriuser/a_object_of_type.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002-2009 Michael Ruff (mruff at chiaro.com)
+ * Copyright (c) 2002-2013 Michael Ruff (mruff at chiaro.com)
  *
  *    This source code is free software; you can redistribute it
  *    and/or modify it in source code form under the terms of the GNU
@@ -45,7 +45,7 @@ int acc_object_of_type(handle object, PLI_INT32 type)
 	  case accScope:
 	    if (vtype == vpiModule || vtype == vpiNamedBegin ||
 		vtype == vpiNamedFork || vtype == vpiTask ||
-		vtype == vpiFunction) rtn = 1;
+		vtype == vpiFunction || vtype == vpiGenScope) rtn = 1;
 	    break;
 
 	  case accNet: rtn = vtype == vpiNet; break;