Improving clean script, oldie breaks the build.

scripts/clean.sh

@@ -1,6 +1,6 @@
 #!/bin/bash -e
 
-for d in /tmp /var/tmp /var/log; do
-    find ${d} -mindepth 1 -exec rm -rf {} +
-done
+rm -rf /tmp/* 
+rm -rf /var/tmp
+find /var/log -type f -delete
 rm -rf /etc/resolv.conf