sysmocom-backup: Save two more files from the etc directory

Save the ifplugd.sh script and hostname in the backup as well. I have
a usecase where these two files were modified.

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

@@ -4,6 +4,8 @@
 # Make sure to look at sysmocom-restore to check if the file would
 # be restored right. Currently only some dirs get restored.
 FILES="\
+	etc/hostname \
+	etc/ifplugd.sh \
 	etc/network/interfaces \
 	etc/openvpn
 	etc/osmocom/osmo-bsc-mgcp.cfg \

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 = "r5"
+PR = "r7"
 
 SRC_URI = "file://sysmocom-backup file://sysmocom-restore"
 RDEPENDS_${PN} = "tar"