do not delete build folders in install script as this lead to problems

archiso/build_archiso.sh

@@ -1,6 +1,6 @@
 set -e
 
-build="archiso-profile-do-not-delete"
+build="/tmp/archiso-profile-do-not-delete"
 out="built-isos"
 profile="releng"
 work="/tmp/archiso-tmp"
@@ -31,5 +31,3 @@ EOF
 sudo mkarchiso -v -w $work -o "${out}" $build/$profile
 
 echo "Successfully built arch installation image in ${out}"
-sudo rm -r $work
-rm -r $build