适配升级libmkldnn (PaddlePaddle#8442)

Author: Pcjmmc

deploy/cpp/CMakeLists.txt

@@ -156,7 +156,7 @@ if(WITH_MKL)
     if (WIN32)
       set(MKLDNN_LIB ${MKLDNN_PATH}/lib/mkldnn.lib)
     else ()
-      set(MKLDNN_LIB ${MKLDNN_PATH}/lib/libmkldnn.so.0)
+      set(MKLDNN_LIB ${MKLDNN_PATH}/lib/libdnnl.so.3)
     endif ()
   endif()
 else()