enable_distcc didn't work on zsh anymore since it relies on automatic
variable splitting, which only works in bash.
This change moves clean-up actions for cmake files into an own bash
script.
This change also unifies variable quoting in clean.sh.
Change-Id: I88284e4f68c309bb46ce4b5a842ccc576cd487ed
Reviewed-on: http://gerrit.cloudera.org:8080/8049
Reviewed-by: Lars Volker <lv@cloudera.com>
Tested-by: Impala Public Jenkins
fa93a47dd7