Adding missing declaration for wrapper_tensorSoftmax

llvm/projects/hpvm-tensor-rt/tensor_runtime/include/tensor_signatures.cc

@@ -53,5 +53,6 @@ void dummyFunction(){
   void* TanhWrapper = (void*) &wrapper_tensorTanh;
   void* BatchNormWrapper = (void*) &wrapper_tensorBatchNorm;    
   void* PoolingWrapper = (void*) &wrapper_tensorPooling;    
+  void* softmaxWrapper = (void*) &wrapper_tensorSoftmax;    
 
 }