Fixit for r146633. Make sure UINT_MAX is defined on all platforms.

(Attempt to turn debian-fnt buildbot back to green.)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146635 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Frontend/VerifyDiagnosticConsumer.cpp

@@ -18,6 +18,8 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/Support/Regex.h"
 #include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/DataTypes.h"
+
 using namespace clang;
 
 VerifyDiagnosticConsumer::VerifyDiagnosticConsumer(DiagnosticsEngine &_Diags)