sysmocom-backup: use transform option on restore

* when restoring links e.g. for systemd files
  the links will be created with content// prefix

* use transform instead of strip to remove
  the "content/" prefix

* bump PR

recipes-apps/sysmocom-backup/files/sysmocom-restore

@@ -5,7 +5,7 @@ do_extract() {
 	SEARCH=`tar -tvf $1 | grep $2`
 	RES=$?
 	if [ $RES = 0 ]; then
-		tar -C / -xvf $1 --strip=1 $2
+		tar --transform='s,^content/,,' -C / -xvf $1 $2
 	else
 		echo "Directory '$2' is not in backup '$1'."
 	fi

recipes-apps/sysmocom-backup/sysmocom-backup_1.0.bb

@@ -1,7 +1,7 @@
 DESCRIPTION = "sysmocom config backup and restore scripts"
 LICENSE = "GPLv3+"
 LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58"
-PR = "r10"
+PR = "r11"
 
 SRC_URI = "file://sysmocom-backup file://sysmocom-restore"
 RDEPENDS_${PN} = "tar"