switch the rest of the C decl classes to do their 
allocation through ASTContext.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@48403 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index db4d53a..902f422 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -1064,7 +1064,8 @@
     FieldDecl *FieldDecls[4];
   
     for (unsigned i = 0; i < 4; ++i)
-      FieldDecls[i] = new FieldDecl(SourceLocation(), 0, FieldTypes[i]);
+      FieldDecls[i] = FieldDecl::Create(*this, SourceLocation(), 0,
+                                        FieldTypes[i]);
   
     CFConstantStringTypeDecl->defineBody(FieldDecls, 4);
   }