Now that the MachineInstr leaks are fixed, enable leak checking
in the MachineInstr clone code.

llvm-svn: 53868
diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index 65e5976..d577582 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -328,6 +328,8 @@
 
   // Set parent to null.
   Parent = 0;
+
+  LeakDetector::addGarbageObject(this);
 }
 
 MachineInstr::~MachineInstr() {