add update script

Signed-off-by: Ratan Rai Sur <ratan.r.sur@gmail.com>

update.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+#stop on failure
+set -e
+
+echo "Updating to verion $1"
+sed -i -e "s/pkgver=.*/pkgver=$1/g" PKGBUILD
+
+echo "Updating checksums"
+updpkgsums
+
+echo "Updating SRCINFO"
+makepkg --printsrcinfo > .SRCINFO
+
+echo "Commiting changes"
+git add PKGBUILD .SRCINFO
+git commit -m "Update to version $1"
+git clean -d -f 
+
+echo "Pushing changes"
+git push
+
+echo "Update Complete :)"