edksetup.bat: make sure BASE_TOOLS_PATH be set correctly
Move checkNt32Flag before set BASE_TOOLS_PATH env to make sure it be set
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>