change Arbor cmake dependency type to ("build", "run")

changed title from change cmake dependency type to ("build", "run") to change Arbor cmake dependency type to ("build", "run")

Hi @thater @brent,

(fyi) I changed the type of the dependency on cmake because in some pyNN tests arbor-build-catalogue failed with cmake: not found. If that's not correct, please let me know.

merged

mentioned in commit bb722ca6