Include optimized kernels in pybindings' portable_lib if building them (pytorch#5520)

Summary:
Pull Request resolved: pytorch#5520

reserved
ghstack-source-id: 243867516
exported-using-ghexport

Reviewed By: larryliu0820

Differential Revision: D63147278

fbshipit-source-id: d5aefbf2509a1eca4c32bbbe7224e7b996fa1e57

Author: swolchok

CMakeLists.txt

@@ -680,11 +680,16 @@ if(EXECUTORCH_BUILD_PYBIND)
       etdump
       executorch
       extension_data_loader
-      portable_ops_lib
       util
       torch
   )
 
+  if(EXECUTORCH_BUILD_KERNELS_OPTIMIZED)
+    list(APPEND _dep_libs optimized_native_cpu_ops_lib)
+  else()
+    list(APPEND _dep_libs portable_ops_lib)
+  endif()
+
   if(EXECUTORCH_BUILD_COREML)
     list(APPEND _dep_libs coremldelegate)
   endif()