syncriscv: add role for mirroring the RISC-V port

Going to be served by all our Geo boxes under riscv.mirror.pkgbuild.com.

roles/syncriscv/files/syncriscv

@@ -3,7 +3,7 @@
 target="/srv/riscv"
 lock="/var/lock/syncriscv.lck"
 source_url='rsync://archriscv.felixc.at/archriscv'
-lastupdate_url='https://archriscv.felixc.at/'
+lastupdate_url='https://archriscv.felixc.at/.status/lastupdate.txt'
 
 [ ! -d "${target}" ] && mkdir -p "${target}"
 
@@ -24,7 +24,7 @@ rsync_cmd() {
 }
 
 # if we are called without a tty (cronjob) only run when there are changes
-if ! tty -s && [[ -f "$target/index.html" ]] && diff -b <(curl -Ls "$lastupdate_url") "$target/lastupdate" >/dev/null; then
+if ! tty -s && [[ -f "$target/.status/lastupdate.txt" ]] && diff -b <(curl -Ls "$lastupdate_url") "$target/.status/lastupdate.txt" >/dev/null; then
 	exit 0
 fi