failure does not clean up builddir

[nekopsykose]

if ckms fails for any reason the /var/lib/ckms/mod build/src folder is not cleaned. this means even if you fix it later (e.g. it required updating the ckms.ini to fix it) you have to manually rm -rf the folder so it copies in the new src (which could be newly patched, or have an updated ckms.ini), etc

though maybe this is a hook issue in chimera instead where on failures it should do that for you, not sure