Update 20_telegram_cli.sh

Author: darthnoward

scripts.d/20_telegram_cli.sh

@@ -10,8 +10,7 @@ sed -i "s/\-fPIC//" Makefile.in
 sed -i "s/\-Werror //" Makefile.in
 ./configure
 CXX=arm-linux-gnueabihf-g++ make
-cp ./bin/telegram-cli /mnt/img_root/usr/local/bin/telegram-cli
-mkdir -p /mnt/img_root/etc/telegram-cli
-cp ./server.pub /mnt/img_root/etc/telegram-cli/server.pub
-cd ../
-rm -rf tg
+cd .. || exit 1
+cp tg/bin/telegram-cli mnt/img_root/usr/local/bin/telegram-cli
+mkdir -p mnt/img_root/etc/telegram-cli
+cp tg/server.pub mnt/img_root/etc/telegram-cli/server.pub