Hopefully unbreak build with g++ >= 4.3.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93060 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 0c94f40..ac13b95 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -26,6 +26,7 @@
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/MC/MCSectionMachO.h"
+#include <algorithm>
 using namespace clang;
 
 //===----------------------------------------------------------------------===//