use the default cdn address for mklml package on windows

test=develop

cmake/external/mklml.cmake

@@ -48,7 +48,7 @@ IF((NOT DEFINED MKLML_VER) OR (NOT DEFINED MKLML_URL))
     MESSAGE(STATUS "use pre defined download url")
     if(WIN32)
         SET(MKLML_VER "mklml_win_2019.0.20180710" CACHE STRING "" FORCE)
-        SET(MKLML_URL "https://paddle-windows.bj.bcebos.com/mklml/${MKLML_VER}.zip" CACHE STRING "" FORCE)
+        SET(MKLML_URL "https://paddlepaddledeps.cdn.bcebos.com/${MKLML_VER}.zip" CACHE STRING "" FORCE)
     else()
         SET(MKLML_VER "mklml_lnx_2019.0.20180710" CACHE STRING "" FORCE)
         SET(MKLML_URL "http://paddlepaddledeps.cdn.bcebos.com/${MKLML_VER}.tgz" CACHE STRING "" FORCE)