move the codegen ASTConsumer out of the driver into libcodegen,
eliminating a bunch of forwarding methods and generally 
simplifying things.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46792 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/AST/ASTConsumer.cpp b/AST/ASTConsumer.cpp
index dd83975..b3d1271 100644
--- a/AST/ASTConsumer.cpp
+++ b/AST/ASTConsumer.cpp
@@ -13,9 +13,10 @@
 
 #include "clang/AST/ASTConsumer.h"
 #include "clang/AST/Decl.h"
-
 using namespace clang;
 
+ASTConsumer::~ASTConsumer() {}
+
 void ASTConsumer::HandleTopLevelDeclaration(Decl* d) {
   if (ScopedDecl* sd = dyn_cast<ScopedDecl>(d))
     while (sd) {