do not copy mipsel ndk script which is not supported yet

Signed-off-by: Nliwentao <liwentao20@huawei.com>

Change-Id: If187b173ede4d4e6c13cf5829e866330deeb0f10

ndk_script/toolchain.sh

@@ -22,7 +22,7 @@ do
 done
 
 
-ndk_dir=$(ls ${SOURCE_DIR}/lib/|more |grep ohos |awk '{print $NF}')
+ndk_dir=$(ls ${SOURCE_DIR}/lib/|more |grep ohos |grep -v mipsel |grep -v riscv |awk '{print $NF}')
 
 for i in $ndk_dir
 do