base-files: sysupgrade: fixes not found error

Fixes the following errors:
  ash: date: not found
  ash: logger: not found

Fixes: c7251e5 ("x86: upgrade from img.gz error")

package/base-files/files/lib/upgrade/stage2

@@ -53,7 +53,7 @@ switch_to_ramfs() {
 		mtd partx losetup mkfs.ext4				\
 		ubiupdatevol ubiattach ubiblock ubiformat		\
 		ubidetach ubirsvol ubirmvol ubimkvol			\
-		snapshot snapshot_tool					\
+		snapshot snapshot_tool date logger			\
 		$RAMFS_COPY_BIN
 	do
 		local file="$(command -v "$binary" 2>/dev/null)"