Add missing standard headers. Patch by Joerg Sonnenberger!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122193 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/OcamlGCPrinter.cpp b/lib/CodeGen/AsmPrinter/OcamlGCPrinter.cpp
index c8a63cf..1153817 100644
--- a/lib/CodeGen/AsmPrinter/OcamlGCPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/OcamlGCPrinter.cpp
@@ -26,6 +26,7 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/FormattedStream.h"
+#include <cctype>
 using namespace llvm;
 
 namespace {