automated: touch the log symlinks when finished

automated/run-lts.sh

@@ -6,4 +6,5 @@ git pull
 LOG_FILE="$1-build-$(date -u +%F_%T).log"
 ln -sf $LOG_FILE lts-build.log
 time script -q -c "./build.sh $*" $LOG_FILE
+touch -h $LOG_FILE
 date

automated/run-nightly.sh

@@ -15,6 +15,7 @@ while true; do
     fi
     ln -sf $LOG_FILE nightly-build.log
     time script -q -c "./build.sh nightly-$(date -u +%F) $cmd" $LOG_FILE
+    touch -h $LOG_FILE
     ${cmd:+exit 0}
     ${once:+date; exit 0}
     echo "$0: run completed at $(date)"