move variable UPLOAD_TP_FILE to the beginning or it cant be initializ…

…ed when running build-whl task (#35895)

paddle/scripts/paddle_build.bat

@@ -77,6 +77,7 @@ if not defined retry_times set retry_times=3
 if not defined PYTHON_ROOT set PYTHON_ROOT=C:\Python37
 if not defined BUILD_DIR set BUILD_DIR=build
 set task_name=%1
+set UPLOAD_TP_FILE=OFF
 
 rem ------initialize the python environment------
 set PYTHON_EXECUTABLE=%PYTHON_ROOT%\python.exe
@@ -382,7 +383,6 @@ if "%WITH_GPU%"=="ON" (
 )
 set THIRD_PARTY_HOME=%cache_dir:\=/%/third_party/%sub_dir%
 set THIRD_PARTY_PATH=%THIRD_PARTY_HOME%/%md5%
-set UPLOAD_TP_FILE=OFF
 
 if not exist %THIRD_PARTY_PATH% (
     echo There is no usable third_party cache in %THIRD_PARTY_PATH%, will download from bos.
@@ -521,8 +521,8 @@ if %ERRORLEVEL% NEQ 0 (
     )
 )
 
-set BCE_FILE=%cache_dir%\bce-python-sdk-0.8.33\BosClient.py
-if %UPLOAD_TP_FILE%==ON (
+if "%UPLOAD_TP_FILE%"=="ON" (
+    set BCE_FILE=%cache_dir%\bce-python-sdk-0.8.33\BosClient.py
     echo Uploading third_party: checking bce ...
     if not exist %cache_dir%\bce-python-sdk-0.8.33 (
         echo There is no bce in this PC, will install bce.