Improve DRC run directory location

utils/run_drc.sh

diff --git a/utils/run_drc.sh b/utils/run_drc.sh
index 82e5af1..544870d 100755
--- a/utils/run_drc.sh
+++ b/utils/run_drc.sh
@@ -7,7 +7,8 @@
 fi
 
 # go into cell specific run folder
-cd ../temp
+mkdir -p run_dir
+cd run_dir
 if [ ! -d "$1" ]; then
     mkdir -p "$1";
 fi