Add support for 小鱼儿yr系统维护PE

INSTALL/grub/grub.cfg

@@ -156,6 +156,12 @@ function locate_initrd {
 }
 
 function locate_wim {
+    if vt_strstr "$vt_volume_id" "yr"; then
+        if [ -f (loop)/isyl/isyl ]; then
+            vt_wim_peset
+        fi
+    fi
+
     vt_windows_locate_wim_patch (loop)
     
     if [ -n "${vtdebug_flag}" ]; then