timeshift: fix compatibility with util-linux 2.37.1.

Timeshift will only start in "Live USB Mode".

Upstream issues:
teejee2008/timeshift#425
teejee2008/timeshift#753
teejee2008/timeshift#755

srcpkgs/timeshift/patches/d437358a.patch

@@ -0,0 +1,23 @@
+commit d437358ac3debf7625aefda4d0bd387a91b69df5
+Author: Tony George <[email protected]>
+Date:   Sun Jun 6 12:04:07 2021 +0530
+
+    Fix for #425, #753, #755
+
+diff --git a/src/Utility/Device.vala b/src/Utility/Device.vala
+index 18f09de..b276055 100755
+--- a/src/Utility/Device.vala
++++ b/src/Utility/Device.vala
+@@ -428,10 +428,10 @@ public class Device : GLib.Object{
+
+ 			try{
+ 				if (lsblk_is_ancient){
+-					rex = new Regex("""NAME="(.*)" KNAME="(.*)" LABEL="(.*)" UUID="(.*)" TYPE="(.*)" FSTYPE="(.*)" SIZE="(.*)" MOUNTPOINT="(.*)" MODEL="(.*)" RO="([0-9]+)" RM="([0-9]+)" MAJ:MIN="([0-9:]+)"""");
++					rex = new Regex("""NAME="(.*)" KNAME="(.*)" LABEL="(.*)" UUID="(.*)" TYPE="(.*)" FSTYPE="(.*)" SIZE="(.*)" MOUNTPOINT="(.*)" MODEL="(.*)" RO="([0-9]+)" RM="([0-9]+)" MAJ[_:]MIN="([0-9:]+)"""");
+ 				}
+ 				else{
+-					rex = new Regex("""NAME="(.*)" KNAME="(.*)" LABEL="(.*)" UUID="(.*)" TYPE="(.*)" FSTYPE="(.*)" SIZE="(.*)" MOUNTPOINT="(.*)" MODEL="(.*)" RO="([0-9]+)" HOTPLUG="([0-9]+)" MAJ:MIN="([0-9:]+)" PARTLABEL="(.*)" PARTUUID="(.*)" PKNAME="(.*)" VENDOR="(.*)" SERIAL="(.*)" REV="(.*)"""");
++					rex = new Regex("""NAME="(.*)" KNAME="(.*)" LABEL="(.*)" UUID="(.*)" TYPE="(.*)" FSTYPE="(.*)" SIZE="(.*)" MOUNTPOINT="(.*)" MODEL="(.*)" RO="([0-9]+)" HOTPLUG="([0-9]+)" MAJ[_:]MIN="([0-9:]+)" PARTLABEL="(.*)" PARTUUID="(.*)" PKNAME="(.*)" VENDOR="(.*)" SERIAL="(.*)" REV="(.*)"""");
+ 				}
+
+ 				if (rex.match (line, 0, out match)){

srcpkgs/timeshift/template

@@ -1,7 +1,7 @@
 # Template file for 'timeshift'
 pkgname=timeshift
 version=20.11.1
-revision=1
+revision=2
 build_style=gnu-makefile
 hostmakedepends="gettext pkg-config vala which"
 makedepends="libgee08-devel json-glib-devel gtk+3-devel vte3-devel libgirepository-devel"