update tool/ssinstall.

Signed-off-by: shenmo <jifengshenmo@outlook.com>

tool/ssinstall

@@ -10,6 +10,10 @@ case $(arch) in
    aarch64)
 	STORE_URL="aarch64-store"
 	;;
+   loongarch64)
+   	STORE_URL="loong64-store"
+   	STORE_LIST_URL="-loong64"
+   	;;
 esac
 
 echo "Spark Store Install script. 星火商店安装脚本"
@@ -162,4 +166,3 @@ if [ ! -z "$IS_SHA512SUM_CHECKED" ]; then
         fi
     fi
 fi
-