Update install.sh

plugins/qbittorrent/install.sh

@@ -30,6 +30,8 @@ Install_qbittorrent()
 	if [ ! -f ${QB_DIR}/libtorrent-rasterbar-1.1.9.tar.gz ];then
 		wget -O ${QB_DIR}/libtorrent-rasterbar-1.1.9.tar.gz https://github.com/arvidn/libtorrent/releases/download/libtorrent-1_1_9/libtorrent-rasterbar-1.1.9.tar.gz
 	fi
+
+	if [ ! -f  $serverPath/lib/libtorrent ];then
 		cd ${QB_DIR} && tar -zxf libtorrent-rasterbar-1.1.9.tar.gz
 		cd ${QB_DIR} && cd libtorrent-rasterbar-1.1.9
 		
@@ -40,6 +42,7 @@ Install_qbittorrent()
 		#echo "/www/server/lib/libtorrent/lib" > /etc/ld.so.conf.d/libtorrent-x86_64.conf
 		echo "$serverPath/lib/libtorrent/lib" > /etc/ld.so.conf.d/libtorrent-x86_64.conf
 		ldconfig
+	fi
 	#export LD_LIBRARY_PATH=/www/server/lib/libtorrent/lib
 	#export CPLUS_INCLUDE_PATH=/www/server/lib/libtorrent/include/
 	export CPLUS_INCLUDE_PATH=$serverPath/lib/libtorrent/include/