Sort the #include lines for tools/...

Again, tools are trickier to pick the main module header for than
library source files. I've started to follow the pattern of using
LLVMContext.h when it is included as a stub for program source files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169252 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/opt/PrintSCC.cpp b/tools/opt/PrintSCC.cpp
index 11efdcd..be45ac1 100644
--- a/tools/opt/PrintSCC.cpp
+++ b/tools/opt/PrintSCC.cpp
@@ -25,12 +25,12 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Pass.h"
-#include "llvm/Module.h"
+#include "llvm/ADT/SCCIterator.h"
 #include "llvm/Analysis/CallGraph.h"
+#include "llvm/Module.h"
+#include "llvm/Pass.h"
 #include "llvm/Support/CFG.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/ADT/SCCIterator.h"
 using namespace llvm;
 
 namespace {