some compiler don't get string from TLOF.h implicitly or something.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78864 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PIC16/PIC16TargetObjectFile.h b/lib/Target/PIC16/PIC16TargetObjectFile.h
index edd2b1c..91415bc 100644
--- a/lib/Target/PIC16/PIC16TargetObjectFile.h
+++ b/lib/Target/PIC16/PIC16TargetObjectFile.h
@@ -12,6 +12,7 @@
 
 #include "llvm/Target/TargetLoweringObjectFile.h"
 #include <vector>
+#include <string>
 
 namespace llvm {
   class GlobalVariable;