Add missing <cctype> include, from Joerg Sonnenberger
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@123668 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/driver/driver.cpp b/tools/driver/driver.cpp
index 594b07b..e3797d4 100644
--- a/tools/driver/driver.cpp
+++ b/tools/driver/driver.cpp
@@ -35,6 +35,7 @@
#include "llvm/Support/Program.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/system_error.h"
+#include <cctype>
using namespace clang;
using namespace clang::driver;