Sink the BuiltinInfo object from ASTContext into the
preprocessor and initialize it early in clang-cc.  This
ensures that __has_builtin works in all modes, not just
when ASTContext is around.

llvm-svn: 73319
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 8e3c3ce..ff00bc2 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -16,6 +16,7 @@
 #include "clang/AST/RecordLayout.h"
 #include "clang/AST/StmtVisitor.h"
 #include "clang/AST/ASTDiagnostic.h"
+#include "clang/Basic/Builtins.h"
 #include "clang/Basic/TargetInfo.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/Support/Compiler.h"