eliminate RegisterOpt.  It does the same thing as RegisterPass.

llvm-svn: 29925
diff --git a/llvm/lib/Transforms/Scalar/LowerGC.cpp b/llvm/lib/Transforms/Scalar/LowerGC.cpp
index aa599ec..851009c 100644
--- a/llvm/lib/Transforms/Scalar/LowerGC.cpp
+++ b/llvm/lib/Transforms/Scalar/LowerGC.cpp
@@ -56,7 +56,7 @@
     const StructType *getRootRecordType(unsigned NumRoots);
   };
 
-  RegisterOpt<LowerGC>
+  RegisterPass<LowerGC>
   X("lowergc", "Lower GC intrinsics, for GCless code generators");
 }