zling: fix cmake argument name for enabling zling
zling: fix cmake argument name for enabling zling

Signed-off-by: Evan Nemerson <178b62e73cc3fab9e30bf27b2372c9ff92401915@nemerson.com>

wolut/squash,Cloudef/squash,Cloudef/squash,quixdb/squash,wolut/squash,quixdb/squash,quixdb/squash,jibsen/squash,wolut/squash,jibsen/squash,Cloudef/squash,jibsen/squash