Add #include that is no longer implicitly included

llvm-svn: 1651
diff --git a/llvm/lib/Target/TargetSchedInfo.cpp b/llvm/lib/Target/TargetSchedInfo.cpp
index c02654f..41d013e 100644
--- a/llvm/lib/Target/TargetSchedInfo.cpp
+++ b/llvm/lib/Target/TargetSchedInfo.cpp
@@ -6,6 +6,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Target/MachineSchedInfo.h"
+#include "llvm/Target/TargetMachine.h"
 
 // External object describing the machine instructions
 // Initialized only when the TargetMachine class is created