make sure ukernel prod is everywhere XNNPACK is (pytorch#142086)

Just double checking that ukernel prod (which should be linked with XNNPACK) is in all the places XNNPACK is
Pull Request resolved: pytorch#142086
Approved by: https://github.com/kirklandsign

Author: mcr229

cmake/Dependencies.cmake

@@ -500,7 +500,7 @@ if(USE_XNNPACK AND NOT USE_SYSTEM_XNNPACK)
     set(XNNPACK_INCLUDE_DIR "${XNNPACK_SOURCE_DIR}/include" CACHE STRING "XNNPACK include directory")
   endif()
 
-  if(NOT TARGET XNNPACK)
+  if(NOT TARGET XNNPACK OR NOT TARGET microkernels-prod)
     set(XNNPACK_LIBRARY_TYPE "static" CACHE STRING "")
     set(XNNPACK_BUILD_BENCHMARKS OFF CACHE BOOL "")
     set(XNNPACK_BUILD_TESTS OFF CACHE BOOL "")
@@ -548,16 +548,19 @@ if(USE_XNNPACK AND NOT USE_SYSTEM_XNNPACK)
   endif()
 
   include_directories(SYSTEM ${XNNPACK_INCLUDE_DIR})
-  list(APPEND Caffe2_DEPENDENCY_LIBS XNNPACK)
+  list(APPEND Caffe2_DEPENDENCY_LIBS XNNPACK microkernels-prod)
 elseif(NOT TARGET XNNPACK AND USE_SYSTEM_XNNPACK)
   add_library(XNNPACK SHARED IMPORTED)
+  add_library(microkernels-prod SHARED IMPORTED)
   find_library(XNNPACK_LIBRARY XNNPACK)
+  find_library(microkernels-prod_LIBRARY microkernels-prod)
   set_property(TARGET XNNPACK PROPERTY IMPORTED_LOCATION "${XNNPACK_LIBRARY}")
-  if(NOT XNNPACK_LIBRARY)
+  set_property(TARGET microkernels-prod PROPERTY IMPORTED_LOCATION "${microkernels-prod_LIBRARY}")
+  if(NOT XNNPACK_LIBRARY or NOT microkernels-prod_LIBRARY)
     message(FATAL_ERROR "Cannot find XNNPACK")
   endif()
   message("-- Found XNNPACK: ${XNNPACK_LIBRARY}")
-  list(APPEND Caffe2_DEPENDENCY_LIBS XNNPACK)
+  list(APPEND Caffe2_DEPENDENCY_LIBS XNNPACK microkernels-prod)
 endif()
 
 # ---[ Vulkan deps