Plug leak. The DenseMaps of CXXRecordLayoutInfo weren't freed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@112006 91177308-0d34-0410-b5e6-96231b3b80d8

lib/AST/RecordLayout.cpp

@@ -19,8 +19,10 @@ using namespace clang;
 void ASTRecordLayout::Destroy(ASTContext &Ctx) {
   if (FieldOffsets)
     Ctx.Deallocate(FieldOffsets);
-  if (CXXInfo)
+  if (CXXInfo) {
     Ctx.Deallocate(CXXInfo);
+    CXXInfo->~CXXRecordLayoutInfo();
+  }
   this->~ASTRecordLayout();
   Ctx.Deallocate(this);
 }