Fixed syntax error in file tmpfiles.d file creation

Author: assrinivasan

files/build_templates/sonic_debian_extension.j2

@@ -105,10 +105,10 @@ sudo dpkg --root=$FILESYSTEM_ROOT -i $debs_path/sonic-nettools_*.deb || \
 sudo setcap 'cap_net_raw=+ep' $FILESYSTEM_ROOT/usr/bin/wol
 
 # This is needed for moving monit logs, state and logrotate status to tmpfs
-sudo mkdir -p $FILESYSTEM_ROOT/etc/tmpfiles.d/tmpfs-monit.conf
+sudo touch $FILESYSTEM_ROOT/etc/tmpfiles.d/tmpfs-monit.conf
 sudo echo "d	/dev/shm/monit/ 0755 root root" > $FILESYSTEM_ROOT/etc/tmpfiles.d/tmpfs-monit.conf
 
-sudo mkdir -p $FILESYSTEM_ROOT/etc/tmpfiles.d/tmpfs-logrotate.conf
+sudo touch $FILESYSTEM_ROOT/etc/tmpfiles.d/tmpfs-logrotate.conf
 sudo echo "d	/dev/shm/logrotate/ 0755 root root" > $FILESYSTEM_ROOT/etc/tmpfiles.d/tmpfs-logrotate.conf